| 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 N3
    
    
      227 of 2500 most used kanji in newspapers
    
Stroke order
On reading compounds
- 論 【ロン】 argument, discussion, dispute, controversy, discourse, debate, theory (e.g. of evolution), doctrine, essay, treatise, comment
 - 論客 【ロンキャク】 controversialist, polemic, disputant
 - 公論 【コウロン】 public opinion, unbiased criticism, unbiassed criticism
 - 対論 【タイロン】 arguing face to face
 
Kun reading compounds
- 論う 【あげつらう】 to discuss, to find fault with, to criticize, to criticise
 
Readings
- Korean:
 - ron, yun
 
Spanish
- teoría
 - argumento
 - discurso
 
Portuguese
- argumento
 - discurso
 
French
- argumentation
 - discours
 
| 881 | A Guide To Reading and Writing Japanese (Florence Sakade) | 
| 1006 | A Guide To Reading and Writing Japanese 3rd edition (Henshall, Seeley and De Groot) | 
| 996 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) | 
| 267 | A New Dictionary of Kanji Usage | 
| 4391 | Classic Nelson (Andrew Nelson) | 
| 406 | Essential Kanji (P.G. O’Neill) | 
| 908 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) | 
| 2320 | Japanese Names (P.G. O’Neill) | 
| 293 | Kanji and Kana (Spahn and Hadamitzky) | 
| 293 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) | 
| 496 | Kanji in Context (Nishiguchi and Kono) | 
| 1700 | Kodansha Compact Kanji Guide | 
| 1981 | Kodansha Kanji Dictionary (Jack Halpern) | 
| 1058 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) | 
| 1424 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) | 
| 1837 | Les Kanjis dans la tete (Yves Maniette) | 
| 35658 | Morohashi | 
| 1574 | New Japanese English Character Dictionary (Jack Halpern) | 
| 5646 | New Nelson (John Haig) | 
| 1820 | Remembering The Kanji (James Heisig) | 
| 1961 | Remembering The Kanji, 6th edition (James Heisig) | 
| 110 | The Kanji Way to Japanese Language Power (Dale Crowley) | 
| 989 | Tuttle Kanji Cards (Alexander Kask) | 
| 3053 | 2001 Kanji | 
| 7a8.13 | The Kanji Dictionary | 
| 1-7-8 | SKIP code | 
| 0862.7 | Four corner code | 
| 1-47-32 | JIS X 0208-1997 kuten code | 
| 8ad6 | Unicode hex code |