| 618 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 715 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 689 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 1027 | A New Dictionary of Kanji Usage |
| 4789 | Classic Nelson (Andrew Nelson) |
| 819 | Essential Kanji (P.G. O’Neill) |
| 1838 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 516 | Kanji and Kana (Spahn and Hadamitzky) |
| 525 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1420 | Kanji in Context (Nishiguchi and Kono) |
| 1797 | Kodansha Compact Kanji Guide |
| 1968 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1049 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1415 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1449 | Les Kanjis dans la tete (Yves Maniette) |
| 39871 | Morohashi |
| 1563 | New Japanese English Character Dictionary (Jack Halpern) |
| 6177 | New Nelson (John Haig) |
| 1437 | Remembering The Kanji (James Heisig) |
| 1545 | Remembering The Kanji, 6th edition (James Heisig) |
| 791 | Tuttle Kanji Cards (Alexander Kask) |
Jōyō kanji, taught in grade 5
JLPT level N1
1218 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 酸 【サン】 acid, sourness, sour taste
- 酸化 【サンカ】 oxidation, oxidization
- 炭酸 【タンサン】 carbonic acid, carbonated water, carbonated drink, baking soda, sodium carbonate
- アミノ酸 【アミノサン】 amino acid
Kun reading compounds
- 酸い 【すい】 sour, acid
- 酸葉 【すいば】 sorrel (Rumex acetosa), Common sorrel, garden sorrel, spinach dock
Readings
- Korean:
- san
Spanish
- ácido
- agrio
Portuguese
- ácido
- amargo
- azedo
- picante
French
- acide
- aigre
- amer
- sur (goût)
| 3267 | 2001 Kanji |
| 7e7.2 | The Kanji Dictionary |
| 1-7-7 | SKIP code |
| 1364.7 | Four corner code |
| 1-27-32 | JIS X 0208-1997 kuten code |
| 9178 | Unicode hex code |
Jōyō kanji, taught in grade 4
JLPT level N3
860 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 欠 【ケツ】 lack, deficiency, vacancy, absence, non-attendance
- 欠員 【ケツイン】 vacancy, vacant position
- 補欠 【ホケツ】 filling a vacancy, supplementation, substitute, deputy, alternate, spare
- 出欠 【シュッケツ】 attendance or absence
- 欠缺 【ケンケツ】 lacuna, gap where something is lacked
- 欠缺利札 【ケンケツリサツ】 invalid coupon
- 阿毘羅吽欠 【アビラウンケン】 a-bi-ra-un-ken (mantra directed to Vairocana)
Kun reading compounds
- 欠ける 【かける】 to chip, to be chipped, to break (off), to be damaged, to be missing (from a set, team, etc.), to be absent, to become lost, to be lacking (in), to be short (of), to be deficient, to be wanting (in), to wane (of the moon), to go into eclipse
- 欠く 【かく】 to chip, to nick, to break, to crack, to lack
- 欠くことができない 【かくことができない】 indispensable, essential, necessary
Readings
- Korean:
- heum, gam, gyeol
Spanish
- falta
- carestía
- romperse
- agrietarse
- faltar
- carecer
Portuguese
- falta
- intervalo
- falha
French
- manquer
- lacune
- rater
- radical bâillement (no. 76)
| 597 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 496 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 471 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 968 | A New Dictionary of Kanji Usage |
| 2412 | Classic Nelson (Andrew Nelson) |
| 713 | Essential Kanji (P.G. O’Neill) |
| 647 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 383 | Kanji and Kana (Spahn and Hadamitzky) |
| 384 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 659 | Kanji in Context (Nishiguchi and Kono) |
| 1119 | Kodansha Compact Kanji Guide |
| 2481 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1255 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1721 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 477 | Les Kanjis dans la tete (Yves Maniette) |
| 15991 | Morohashi |
| 1987 | New Japanese English Character Dictionary (Jack Halpern) |
| 2928 | New Nelson (John Haig) |
| 466 | Remembering The Kanji (James Heisig) |
| 505 | Remembering The Kanji, 6th edition (James Heisig) |
| 442 | Tuttle Kanji Cards (Alexander Kask) |
| 2562 | 2001 Kanji |
| 4j0.1 | The Kanji Dictionary |
| 2-2-2 | SKIP code |
| 4-4-4 | SKIP code |
| 2780.2 | Four corner code |
| 1-23-71 | JIS X 0208-1997 kuten code |
| 6b20 | Unicode hex code |