| 723 | A Guide To Reading and Writing Japanese (Florence Sakade) |
| 620 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 796 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 227 | A New Dictionary of Kanji Usage |
| 2773 | Classic Nelson (Andrew Nelson) |
| 386 | Essential Kanji (P.G. O’Neill) |
| 715 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 1789 | Japanese Names (P.G. O’Neill) |
| 93 | Kanji and Kana (Spahn and Hadamitzky) |
| 93 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 400 | Kanji in Context (Nishiguchi and Kono) |
| 1280 | Kodansha Compact Kanji Guide |
| 2648 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1351 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 1832 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1791 | Les Kanjis dans la tete (Yves Maniette) |
| 19113 | Morohashi |
| 2135 | New Japanese English Character Dictionary (Jack Halpern) |
| 3439 | New Nelson (John Haig) |
| 1775 | Remembering The Kanji (James Heisig) |
| 1913 | Remembering The Kanji, 6th edition (James Heisig) |
| 179 | The Kanji Way to Japanese Language Power (Dale Crowley) |
| 600 | Tuttle Kanji Cards (Alexander Kask) |
Jōyō kanji, taught in grade 4
274 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 無 【ム】 nothing, naught, nought, nil, zero, un-, non-
- 無意識 【ムイシキ】 unconsciousness, unconscious, involuntary, automatic, mechanical, unintentional, spontaneous, the unconscious
- 皆無 【カイム】 nonexistent, nil, none, nothing (at all), bugger-all
- 虚無 【キョム】 nihility, nothingness
- 無 【ブ】 un-, non-, bad ..., poor ...
- 不気味 【ブキミ】 weird, eerie, ominous, creepy, uncanny, unearthly
Kun reading compounds
- 無い 【ない】 nonexistent, not being (there), unowned, not had, unpossessed, unique, not, impossible, won't happen, not, to not be, to have not
- 【ないといけない】 have to (verb), must (verb), is indispensable, absolutely necessary
- 苦無 【くない】 ninja throwing knives, mediaeval farming tool for digging, prying, etc.
Readings
- Korean:
- mu
Spanish
- nada
- inexistente
- prefijo negativo
- no hay
Portuguese
- Sem valor
- nada
- não sou/ estou
- nihil
- não
French
- néant
- rien
- ne pas
- non
- in-
- négatif
| 2340 | 2001 Kanji |
| 4d8.8 | The Kanji Dictionary |
| 2-2-10 | SKIP code |
| 2-8-4 | SKIP code |
| 8033.1 | Four corner code |
| 1-44-21 | JIS X 0208-1997 kuten code |
| 7121 | Unicode hex code |
Jōyō kanji, taught in grade 6
JLPT level N2
1717 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 灰色 【ハイイロ】 grey, gray, ashen
- 灰色植物門 【カイショクショクブツモン】 Glaucophyta (phylum of freshwater microscopic algae)
- 石灰 【セッカイ】 lime, quicklime, caustic lime
- 生石灰 【セイセッカイ】 quick lime
Kun reading compounds
- 灰 【はい】 ash, ashes
- 灰色 【はいいろ】 grey, gray, ashen
- 死の灰 【しのはい】 lethal radioactive fallout, atomic dust
- 降灰 【こうかい】 fall of (volcanic) ash, falling ash
Readings
- Korean:
- hoe
Spanish
- ceniza
- cremar
Portuguese
- cinzas
- suco adstringente
- cremar
French
- cendre
- lessive
- incinéré
| 834 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) |
| 818 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 1788 | A New Dictionary of Kanji Usage |
| 820 | Classic Nelson (Andrew Nelson) |
| 1325 | Essential Kanji (P.G. O’Neill) |
| 712 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 302 | Japanese Names (P.G. O’Neill) |
| 1343 | Kanji and Kana (Spahn and Hadamitzky) |
| 1426 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 874 | Kanji in Context (Nishiguchi and Kono) |
| 1261 | Kodansha Compact Kanji Guide |
| 3699 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1892 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 2573 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 170 | Les Kanjis dans la tete (Yves Maniette) |
| 18859 | Morohashi |
| 2979 | New Japanese English Character Dictionary (Jack Halpern) |
| 3396 | New Nelson (John Haig) |
| 168 | Remembering The Kanji (James Heisig) |
| 180 | Remembering The Kanji, 6th edition (James Heisig) |
| 840 | Tuttle Kanji Cards (Alexander Kask) |
| 3362 | 2001 Kanji |
| 2p4.1 | The Kanji Dictionary |
| 3-2-4 | SKIP code |
| 7128.9 | Four corner code |
| 1-19-05 | JIS X 0208-1997 kuten code |
| 7070 | Unicode hex code |