Jisho

×

4 strokes
Radical:
sun, day
Parts:
day, sun, Japan, counter for days
Kun:
-び-か
On:
ニチジツ
Jōyō kanji, taught in grade 1
JLPT level N5
1 of 2500 most used kanji in newspapers

Speed

Stroke order

On reading compounds

  • 日 【ニチ】 Sunday, nth day (of the month), counter for days, Japan
  • 日時 【ニチジ】 date and time (of a meeting, departure, etc.), days and hours
  • 抗日 【コウニチ】 resistance against Japanese aggression, anti-Japanese (campaign, movement, etc.)
  • 在日 【ザイニチ】 resident in Japan (of a foreigner), situated in Japan (e.g. of an embassy), Zainichi, Zainichi Korean, North or South Korean national with permanent residency in Japan (who came to the country before 1945, or a descendant of such a person)
  • 日月 【ジツゲツ】 sun and moon, time, days and months, years, Sunday and Monday
  • 日外 【ジツガイ】 at one time, some time ago, once
  • 両日 【リョウジツ】 both days, two days
  • 三十日 【ミソカ】 last day of the month

Kun reading compounds

  • 日 【ひ】 day, days, sun, sunshine, sunlight, (the) day, daytime, daylight, date, deadline, (past) days, time (e.g. of one's childhood), case (esp. unfortunate), event
  • 日陰 【ひかげ】 shade, shadow, sunshine, sunlight
  • 在りし日 【ありしひ】 past days, bygone days, days of yore, the olden days, while still alive, during one's lifetime
  • あくる日 【あくるひ】 next day, following day

Readings

Japanese names:
あ、 あき、 いる、 く、 くさ、 こう、 す、 たち、 に、 にっ、 につ、 へ
Mandarin Chinese (pinyin):
ri4
Korean:
il

Spanish

  • día
  • solar
  • Japón
  • sol
  • rayo de sol

Portuguese

  • dia
  • sol
  • Japão

French

  • jour
  • soleil
  • Japon
  • compteur de jours
11 A Guide To Reading and Writing Japanese (Florence Sakade)
13 A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot)
62 A Guide To Remembering Japanese Characters (Kenneth G. Henshall)
1 A New Dictionary of Kanji Usage
2097 Classic Nelson (Andrew Nelson)
5 Essential Kanji (P.G. O’Neill)
56 Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki)
77 Japanese Names (P.G. O’Neill)
1.A Japanese for Busy People
5 Kanji and Kana (Spahn and Hadamitzky)
5 Kanji and Kana, 2nd Edition (Spahn and Hadamitzky)
16 Kanji in Context (Nishiguchi and Kono)
963 Kodansha Compact Kanji Guide
3759 Kodansha Kanji Dictionary (Jack Halpern)
1915 Kodansha Kanji Learner’s Dictionary (Jack Halpern)
2606 Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern)
12 Les Kanjis dans la tete (Yves Maniette)
13733 Morohashi
3027 New Japanese English Character Dictionary (Jack Halpern)
2410 New Nelson (John Haig)
12 Remembering The Kanji (James Heisig)
12 Remembering The Kanji, 6th edition (James Heisig)
3 The Kanji Way to Japanese Language Power (Dale Crowley)
33 Tuttle Kanji Cards (Alexander Kask)
3878 2001 Kanji
4c0.1 The Kanji Dictionary
3-3-1 SKIP code
4-4-1 SKIP code
6010.0 Four corner code
1-38-92 JIS X 0208-1997 kuten code
65e5 Unicode hex code

5 strokes
Radical:
tree
Parts:
Variants:
book, present, main, origin, true, real, counter for long cylindrical things
Kun:
もと
On:
ホン
Jōyō kanji, taught in grade 1
JLPT level N5
10 of 2500 most used kanji in newspapers

Speed

Stroke order

On reading compounds

  • 本 【ホン】 book, volume, script, this, present, current, ... in question, ... at issue, main, head, principal, real, genuine, regular, proper, counter for long, cylindrical things, counter for films, TV shows, etc., counter for goals, home runs, etc., counter for telephone calls
  • 本位 【ホンイ】 standard, basis, principle
  • 社会資本 【シャカイシホン】 social capital, SOC
  • 配本 【ハイホン】 distribution of books

Kun reading compounds

  • 元 【もと】 origin, source, beginning, basis, base, foundation, root, cause, (raw) material, ingredient, base, mix (e.g. for a cake), (soup) stock, (one's) side, capital, principal, cost price, root (of a plant), (tree) trunk, part (of a brush, chopsticks, etc.) one holds (with the hand), first three lines of a waka, counter for plants or trees, counter for falcons (in falconry)
  • 本木 【もとき】 original stock
  • 大本 【おおもと】 root, origin, source, cause, basis, foundation, Ōmoto (religion)
  • 旗本 【はたもと】 shogunal vassal, direct retainer of a shogun

Readings

Japanese names:
まと、 ごう
Mandarin Chinese (pinyin):
ben3
Korean:
bon

Spanish

  • libro
  • origen
  • base
  • contador de cosas alargadas

Portuguese

  • livro
  • presente
  • real
  • verdadeiro
  • principal
  • sufixo p/ contagem De coisas longas

French

  • livre
  • présent
  • essentiel
  • origine
  • principal
  • réalité
  • vérité
  • compteur d'objets allongés
45 A Guide To Reading and Writing Japanese (Florence Sakade)
76 A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot)
70 A Guide To Remembering Japanese Characters (Kenneth G. Henshall)
15 A New Dictionary of Kanji Usage
96 Classic Nelson (Andrew Nelson)
20 Essential Kanji (P.G. O’Neill)
61 Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki)
212 Japanese Names (P.G. O’Neill)
2.1 Japanese for Busy People
25 Kanji and Kana (Spahn and Hadamitzky)
25 Kanji and Kana, 2nd Edition (Spahn and Hadamitzky)
37 Kanji in Context (Nishiguchi and Kono)
1046 Kodansha Compact Kanji Guide
4314 Kodansha Kanji Dictionary (Jack Halpern)
2183 Kodansha Kanji Learner’s Dictionary (Jack Halpern)
2937 Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern)
215 Les Kanjis dans la tete (Yves Maniette)
14421 Morohashi
3502 New Japanese English Character Dictionary (Jack Halpern)
2536 New Nelson (John Haig)
211 Remembering The Kanji (James Heisig)
224 Remembering The Kanji, 6th edition (James Heisig)
6 The Kanji Way to Japanese Language Power (Dale Crowley)
47 Tuttle Kanji Cards (Alexander Kask)
1855 2001 Kanji
0a5.25 The Kanji Dictionary
4-5-3 SKIP code
5023.0 Four corner code
1-43-60 JIS X 0208-1997 kuten code
672c Unicode hex code

10 strokes
Radical:
boat
Parts:
navigate, sail, cruise, fly
On:
コウ
Jōyō kanji, taught in grade 5
JLPT level N2
665 of 2500 most used kanji in newspapers

Speed

Stroke order

On reading compounds

  • 航空 【コウクウ】 aviation, flying
  • 航海 【コウカイ】 (sea) voyage, navigation, sailing, passage, cruise
  • 密航 【ミッコウ】 smuggling (people), stowing away
  • 就航 【シュウコウ】 entering service (on a route; of a plane or ship), going into commission, being in service

Readings

Japanese names:
わたる
Mandarin Chinese (pinyin):
hang2
Korean:
hang

Spanish

  • navegar
  • volar

Portuguese

  • navegar
  • vela
  • travessia
  • voar (de avião)

French

  • naviguer
  • faire voile
  • croiser (voile)
  • voler
396 A Guide To Reading and Writing Japanese (Florence Sakade)
505 A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot)
479 A Guide To Remembering Japanese Characters (Kenneth G. Henshall)
497 A New Dictionary of Kanji Usage
3867 Classic Nelson (Andrew Nelson)
561 Essential Kanji (P.G. O’Neill)
858 Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki)
1136 Japanese Names (P.G. O’Neill)
823 Kanji and Kana (Spahn and Hadamitzky)
842 Kanji and Kana, 2nd Edition (Spahn and Hadamitzky)
649 Kanji in Context (Nishiguchi and Kono)
1593 Kodansha Compact Kanji Guide
1671 Kodansha Kanji Dictionary (Jack Halpern)
885 Kodansha Kanji Learner’s Dictionary (Jack Halpern)
1204 Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern)
1888 Les Kanjis dans la tete (Yves Maniette)
30385 Morohashi
1318 New Japanese English Character Dictionary (Jack Halpern)
4933 New Nelson (John Haig)
1870 Remembering The Kanji (James Heisig)
2014 Remembering The Kanji, 6th edition (James Heisig)
543 Tuttle Kanji Cards (Alexander Kask)
857 2001 Kanji
6c4.2 The Kanji Dictionary
1-6-4 SKIP code
2041.7 Four corner code
1-25-50 JIS X 0208-1997 kuten code
822a Unicode hex code

8 strokes
Radical:
cave
Parts:
empty, sky, void, vacant, vacuum
Jōyō kanji, taught in grade 1
JLPT level N4
304 of 2500 most used kanji in newspapers

Speed

Stroke order

On reading compounds

  • 空 【クウ】 empty air, sky, shunyata (the lack of an immutable intrinsic nature within any phenomenon), emptiness, air force, fruitlessness, meaninglessness, void (one of the five elements), empty (e.g. set)
  • 空域 【クウイキ】 airspace
  • 領空 【リョウクウ】 territorial airspace
  • 防空 【ボウクウ】 air defense, air defence

Kun reading compounds

  • 空 【そら】 sky, the air, the heavens, weather, far-off place, distant place, state of mind, feeling, (from) memory, (by) heart, falsehood, lie, somehow, vaguely, fake
  • 空模様 【そらもよう】 look of the sky, weather
  • 定めなき空 【さだめなきそら】 changeable weather
  • 晴れた空 【はれたそら】 clear sky, cloudless sky
  • 開く 【あく】 to open (e.g. doors), to open (e.g. business, etc.), to be empty, to be vacant, to be available, to be free, to be open (e.g. neckline, etc.), to have been opened (of one's eyes, mouth, etc.), to come to an end, to open (one's eyes, mouth, etc.), to have a hole, to form a gap, to have an interval (between events)
  • 空き 【あき】 space, room, gap, emptiness, vacancy, opening, empty seat, free time, time to spare, disuse, unused thing
  • 空き缶 【あきかん】 empty can
  • 開ける 【あける】 to open (a door, etc.), to unwrap (e.g. parcel, package), to unlock, to open (for business, etc.), to empty, to remove, to make space, to make room, to move out, to clear out, to be away from (e.g. one's house), to leave (temporarily), to dawn, to grow light, to end (of a period, season), to begin (of the New Year), to leave (one's schedule) open, to make time (for), to make (a hole), to open up (a hole)
  • 空 【から】 emptiness, being empty, not carrying anything, unburdened, empty-handed, dishonoured (bill, promise, etc.), false, no-show (reservation), put-on (cheeriness, courage, etc.), empty (compliments), insincere
  • 空手 【からて】 karate, being empty-handed, having nothing in one's hands
  • もぬけの殻 【もぬけのから】 completely empty (of a residence, etc.), vacant, deserted, body from which the soul has left, corpse, shed skin (of a snake, insect, etc.)
  • 空く 【すく】 to become less crowded, to thin out, to get empty, to be hungry
  • 空かす 【すかす】 to feel hungry, to get hungry
  • 虚しい 【むなしい】 empty, void, vacant, vain, fruitless, futile, ineffective, lifeless

Readings

Japanese names:
うつ、 き、 く
Mandarin Chinese (pinyin):
kong1, kong4
Korean:
gong

Spanish

  • cielo
  • atmósfera
  • vacío
  • vacante
  • quedarse vacío
  • vaciar

Portuguese

  • esvaziar
  • ceú
  • desocupado
  • vazio
  • vácuo

French

  • vide
  • ciel
  • vacant
  • creux
65 A Guide To Reading and Writing Japanese (Florence Sakade)
66 A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot)
15 A Guide To Remembering Japanese Characters (Kenneth G. Henshall)
233 A New Dictionary of Kanji Usage
3317 Classic Nelson (Andrew Nelson)
184 Essential Kanji (P.G. O’Neill)
77 Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki)
723 Japanese Names (P.G. O’Neill)
2.17 Japanese for Busy People
140 Kanji and Kana (Spahn and Hadamitzky)
140 Kanji and Kana, 2nd Edition (Spahn and Hadamitzky)
461 Kanji in Context (Nishiguchi and Kono)
1452 Kodansha Compact Kanji Guide
2767 Kodansha Kanji Dictionary (Jack Halpern)
1418 Kodansha Kanji Learner’s Dictionary (Jack Halpern)
1913 Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern)
1327 Les Kanjis dans la tete (Yves Maniette)
25415 Morohashi
2227 New Japanese English Character Dictionary (Jack Halpern)
4192 New Nelson (John Haig)
1317 Remembering The Kanji (James Heisig)
1414 Remembering The Kanji, 6th edition (James Heisig)
304 The Kanji Way to Japanese Language Power (Dale Crowley)
73 Tuttle Kanji Cards (Alexander Kask)
772 2001 Kanji
3m5.12 The Kanji Dictionary
2-3-5 SKIP code
2-5-3 SKIP code
3010.1 Four corner code
1-22-85 JIS X 0208-1997 kuten code
7a7a Unicode hex code

7 strokes
Radical:
hiding enclosure
Parts:
Variants:
doctor, medicine
Jōyō kanji, taught in grade 3
JLPT level N4
437 of 2500 most used kanji in newspapers

Speed

Stroke order

On reading compounds

  • 医 【イ】 medicine, the healing art, healing, curing, doctor
  • 医院 【イイン】 doctor's office, doctor's surgery, clinic
  • 軍医 【グンイ】 military physician or surgeon
  • 校医 【コウイ】 school doctor

Kun reading compounds

  • 医する 【いする】 to cure, to heal
  • 薬師 【くすし】 doctor

Readings

Mandarin Chinese (pinyin):
yi1
Korean:
ye, eui

Spanish

  • doctor
  • médico
  • medicina
  • curar

Portuguese

  • doutor
  • remédio

French

  • médecin
  • docteur
345 A Guide To Reading and Writing Japanese (Florence Sakade)
244 A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot)
225 A Guide To Remembering Japanese Characters (Kenneth G. Henshall)
555 A New Dictionary of Kanji Usage
763 Classic Nelson (Andrew Nelson)
440 Essential Kanji (P.G. O’Neill)
132 Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki)
743 Japanese Names (P.G. O’Neill)
3.20 Japanese for Busy People
220 Kanji and Kana (Spahn and Hadamitzky)
220 Kanji and Kana, 2nd Edition (Spahn and Hadamitzky)
325 Kanji in Context (Nishiguchi and Kono)
237 Kodansha Compact Kanji Guide
3715 Kodansha Kanji Dictionary (Jack Halpern)
1902 Kodansha Kanji Learner’s Dictionary (Jack Halpern)
2583 Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern)
1710 Les Kanjis dans la tete (Yves Maniette)
2680 Morohashi
2993 New Japanese English Character Dictionary (Jack Halpern)
590 New Nelson (John Haig)
1694 Remembering The Kanji (James Heisig)
1829 Remembering The Kanji, 6th edition (James Heisig)
277 Tuttle Kanji Cards (Alexander Kask)
3475 2001 Kanji
2t5.2 The Kanji Dictionary
3-2-5 SKIP code
7171.3 Four corner code
1-16-69 JIS X 0208-1997 kuten code
533b Unicode hex code

17 strokes
Radical:
sickness
Parts:
heal, cure
On:
リョウ
Jōyō kanji, taught in junior high
JLPT level N2
600 of 2500 most used kanji in newspapers

Speed

Stroke order

On reading compounds

  • 療養 【リョウヨウ】 recuperation, medical treatment
  • 療法 【リョウホウ】 therapy, treatment, remedy, cure
  • 早期治療 【ソウキチリョウ】 early treatment
  • 加療 【カリョウ】 medical treatment

Readings

Mandarin Chinese (pinyin):
liao2
Korean:
ryo

Spanish

  • curar
  • cicatrizar
  • sanar

Portuguese

  • cura
  • curar

French

  • soins
  • traitement
1911 A Guide To Remembering Japanese Characters (Kenneth G. Henshall)
837 A New Dictionary of Kanji Usage
3078 Classic Nelson (Andrew Nelson)
1705 Essential Kanji (P.G. O’Neill)
751 Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki)
1322 Kanji and Kana (Spahn and Hadamitzky)
1404 Kanji and Kana, 2nd Edition (Spahn and Hadamitzky)
1362 Kanji in Context (Nishiguchi and Kono)
1357 Kodansha Compact Kanji Guide
4078 Kodansha Kanji Dictionary (Jack Halpern)
2067 Kodansha Kanji Learner’s Dictionary (Jack Halpern)
2803 Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern)
1725 Les Kanjis dans la tete (Yves Maniette)
22500 Morohashi
3288 New Japanese English Character Dictionary (Jack Halpern)
3842 New Nelson (John Haig)
1709 Remembering The Kanji (James Heisig)
1845 Remembering The Kanji, 6th edition (James Heisig)
1876 Tuttle Kanji Cards (Alexander Kask)
541 2001 Kanji
5i12.3 The Kanji Dictionary
3-5-12 SKIP code
0019.6 Four corner code
1-46-37 JIS X 0208-1997 kuten code
7642 Unicode hex code

8 strokes
Radical:
child, seed
Parts:
Variants:
study, learning, science
Kun:
まな.ぶ
On:
ガク
Jōyō kanji, taught in grade 1
JLPT level N5
63 of 2500 most used kanji in newspapers

Speed

Stroke order

On reading compounds

  • 学 【ガク】 learning, scholarship, study, erudition, knowledge, education, study of ..., -ology, -ics
  • 学位 【ガクイ】 (academic) degree
  • 短期大学 【タンキダイガク】 junior college, vocationally oriented two or three year post-secondary education institution
  • 法医学 【ホウイガク】 forensic medicine, forensic pathology, medical jurisprudence, legal medicine

Kun reading compounds

  • 学ぶ 【まなぶ】 to learn, to study, to take lessons in

Readings

Japanese names:
たか、 のり
Mandarin Chinese (pinyin):
xue2
Korean:
hag

Spanish

  • estudio
  • aprendizaje
  • ciencia
  • estudiar

Portuguese

  • estudo
  • aprendizagem
  • ciência

French

  • étudier
  • apprendre
  • science
57 A Guide To Reading and Writing Japanese (Florence Sakade)
45 A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot)
10 A Guide To Remembering Japanese Characters (Kenneth G. Henshall)
33 A New Dictionary of Kanji Usage
1271 Classic Nelson (Andrew Nelson)
66 Essential Kanji (P.G. O’Neill)
44 Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki)
719 Japanese Names (P.G. O’Neill)
2.9 Japanese for Busy People
109 Kanji and Kana (Spahn and Hadamitzky)
109 Kanji and Kana, 2nd Edition (Spahn and Hadamitzky)
50 Kanji in Context (Nishiguchi and Kono)
460 Kodansha Compact Kanji Guide
3162 Kodansha Kanji Dictionary (Jack Halpern)
1625 Kodansha Kanji Learner’s Dictionary (Jack Halpern)
2211 Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern)
330 Les Kanjis dans la tete (Yves Maniette)
6974 Morohashi
2555 New Japanese English Character Dictionary (Jack Halpern)
1294 New Nelson (John Haig)
324 Remembering The Kanji (James Heisig)
346 Remembering The Kanji, 6th edition (James Heisig)
15 The Kanji Way to Japanese Language Power (Dale Crowley)
71 Tuttle Kanji Cards (Alexander Kask)
947 2001 Kanji
3n4.2 The Kanji Dictionary
2-5-3 SKIP code
2-3-4 SKIP code
2-5-2 SKIP code
2-3-5 SKIP code
3240.7 Four corner code
9040.7 Four corner code
1-19-56 JIS X 0208-1997 kuten code
5b66 Unicode hex code

6 strokes
Radical:
man, human 人 (亻)
Parts:
Variants:
meeting, meet, party, association, interview, join
Jōyō kanji, taught in grade 2
JLPT level N4
4 of 2500 most used kanji in newspapers

Speed

Stroke order

On reading compounds

  • 会 【カイ】 meeting, assembly, party, gathering, conference, athletic meet, society, association, club
  • 会員 【カイイン】 member, the membership
  • 例会 【レイカイ】 regular meeting
  • 際会 【サイカイ】 meeting, facing, confronting
  • 会 【エ】 gathering (esp. Buddhist, festive, etc.)
  • 会釈 【エシャク】 slight bow (as a greeting or sign of gratitude), nod, salutation, consideration, thoughtfulness
  • 法会 【ホウエ】 Buddhist service (e.g. memorial service)
  • 御斎会 【ゴサイエ】 imperial event at which high monks recited the Golden Light Sutra to pray for national security and good harvests (held annually at the palace from the 8th to the 14th of the first lunar month, between the Nara and Muromachi periods)

Kun reading compounds

  • 会う 【あう】 to meet, to encounter, to see, to have an accident, to have a bad experience
  • 逢うは別れの始め 【あうはわかれのはじめ】 we meet only to part, meeting is the first step to parting
  • 会わせる 【あわせる】 to make (someone) to meet, to let (someone) meet, to expose to, to subject to

Readings

Japanese names:
あい、 い
Mandarin Chinese (pinyin):
hui4, kuai4
Korean:
hoe, goe, gwal

Spanish

  • asociación
  • reunión
  • encontrarse con
  • reunirse

Portuguese

  • encontro
  • reunião
  • festa
  • associação
  • entrevista
  • une

French

  • réunion
  • rencontre
  • meeting
  • parti
  • association
  • entrevue
  • rejoindre
54 A Guide To Reading and Writing Japanese (Florence Sakade)
93 A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot)
87 A Guide To Remembering Japanese Characters (Kenneth G. Henshall)
12 A New Dictionary of Kanji Usage
381 Classic Nelson (Andrew Nelson)
116 Essential Kanji (P.G. O’Neill)
14 Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki)
454 Japanese Names (P.G. O’Neill)
2.1 Japanese for Busy People
158 Kanji and Kana (Spahn and Hadamitzky)
158 Kanji and Kana, 2nd Edition (Spahn and Hadamitzky)
59 Kanji in Context (Nishiguchi and Kono)
47 Kodansha Compact Kanji Guide
2512 Kodansha Kanji Dictionary (Jack Halpern)
1275 Kodansha Kanji Learner’s Dictionary (Jack Halpern)
1741 Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern)
759 Les Kanjis dans la tete (Yves Maniette)
460 Morohashi
2020 New Japanese English Character Dictionary (Jack Halpern)
143 New Nelson (John Haig)
752 Remembering The Kanji (James Heisig)
814 Remembering The Kanji, 6th edition (James Heisig)
16 The Kanji Way to Japanese Language Power (Dale Crowley)
119 Tuttle Kanji Cards (Alexander Kask)
2871 2001 Kanji
2a4.19 The Kanji Dictionary
2-2-4 SKIP code
2-3-3 SKIP code
8073.1 Four corner code
1-18-81 JIS X 0208-1997 kuten code
4f1a Unicode hex code