| 500 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 600 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 572 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 134 | A New Dictionary of Kanji Usage |
| 17 | Classic Nelson (Andrew Nelson) |
| 130 | Essential Kanji (P.G. O’Neill) |
| 104 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 94 | Japanese Names (P.G. O’Neill) |
| 3.18 | Japanese for Busy People |
| 94 | Kanji and Kana (Spahn and Hadamitzky) |
| 94 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 422 | Kanji in Context (Nishiguchi and Kono) |
| 10 | Kodansha Compact Kanji Guide |
| 4242 | Kodansha Kanji Dictionary (Jack Halpern) |
| 2141 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 2890 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1225 | Les Kanjis dans la tete (Yves Maniette) |
| 19 | Morohashi |
| 3434 | New Japanese English Character Dictionary (Jack Halpern) |
| 13 | New Nelson (John Haig) |
| 1217 | Remembering The Kanji (James Heisig) |
| 1302 | Remembering The Kanji, 6th edition (James Heisig) |
| 103 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 444 | Tuttle Kanji Cards (Alexander Kask) |
Jōyō kanji, taught in grade 4
JLPT level N4
101 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 不 【フ】 un-, non-, negative prefix
- 不安 【フアン】 anxiety, uneasiness, worry, apprehension, fear, insecurity, suspense
- 意味不 【イミフ】 of uncertain meaning, ambiguous, cryptic, nonsensical, incomprehensible, perplexing
- 社不 【シャフ】 person unfit for society, misfit
- 無 【ブ】 un-, non-, bad ..., poor ...
- 不気味 【ブキミ】 weird, eerie, ominous, creepy, uncanny, unearthly
Readings
- Korean:
- bu, bul
Spanish
- prefijo negativo: in-
- des-
Portuguese
- Prefixo negativo
- negativa
- não
- feia
- ruim
- deselegante
French
- négation
- non
- mauvais
- laid
- maladroit
| 3154 | 2001 Kanji |
| 0a4.2 | The Kanji Dictionary |
| 4-4-1 | SKIP code |
| 3-3-1 | SKIP code |
| 3-2-2 | SKIP code |
| 1090.0 | Four corner code |
| 1-41-52 | JIS X 0208-1997 kuten code |
| 4e0d | Unicode hex code |
Jōyō kanji, taught in junior high
JLPT level N2
1284 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 凍結 【トウケツ】 freezing (e.g. water), freezing (prices, wages, assets, etc.), moratorium, suspension (e.g. investment)
- 凍死 【トウシ】 death from cold, freezing to death
- 解凍 【カイトウ】 thawing, defrosting, decompression (of data), extraction, unpacking, unzipping
- 自動解凍 【ジドウカイトウ】 self-extracting (file)
Kun reading compounds
- 凍る 【こおる】 to freeze, to become frozen, to freeze over
- 凍える 【こごえる】 to freeze (of one's body), to be frozen, to become numb (with cold), to be chilled
- 凍てる 【いてる】 to freeze, to freeze over
- 凍みる 【しみる】 to freeze, to be frozen over, to congeal
Readings
- Japanese names:
- こおり
- Korean:
- dong
Spanish
- helado
- congelado
- helar
- congelarse
- helarse
- entumecerse
Portuguese
- congelado
- congelar
- refrigerar
French
- gelé
- congeler
- réfrigérer
| 1644 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 1274 | A New Dictionary of Kanji Usage |
| 649 | Classic Nelson (Andrew Nelson) |
| 1435 | Essential Kanji (P.G. O’Neill) |
| 349 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 1205 | Kanji and Kana (Spahn and Hadamitzky) |
| 1268 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1094 | Kanji in Context (Nishiguchi and Kono) |
| 168 | Kodansha Compact Kanji Guide |
| 146 | Kodansha Kanji Dictionary (Jack Halpern) |
| 97 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 111 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 518 | Les Kanjis dans la tete (Yves Maniette) |
| 1670 | Morohashi |
| 129 | New Japanese English Character Dictionary (Jack Halpern) |
| 427 | New Nelson (John Haig) |
| 506 | Remembering The Kanji (James Heisig) |
| 545 | Remembering The Kanji, 6th edition (James Heisig) |
| 1309 | Tuttle Kanji Cards (Alexander Kask) |
| 364 | 2001 Kanji |
| 2b8.2 | The Kanji Dictionary |
| 1-2-8 | SKIP code |
| 3519.6 | Four corner code |
| 1-37-64 | JIS X 0208-1997 kuten code |
| 51cd | Unicode hex code |