| 1184 | A Guide To Remembering Japanese Characters (Kenneth G. Henshall) |
| 1884 | A New Dictionary of Kanji Usage |
| 1730 | Classic Nelson (Andrew Nelson) |
| 1496 | Essential Kanji (P.G. O’Neill) |
| 1308 | Japanese Kanji Flashcards (Max Hodges and Tomoko Okazaki) |
| 2032 | Japanese Names (P.G. O’Neill) |
| 1642 | Kanji and Kana (Spahn and Hadamitzky) |
| 1755 | Kanji and Kana, 2nd Edition (Spahn and Hadamitzky) |
| 1701 | Kanji in Context (Nishiguchi and Kono) |
| 793 | Kodansha Compact Kanji Guide |
| 3513 | Kodansha Kanji Dictionary (Jack Halpern) |
| 1813 | Kodansha Kanji Learner’s Dictionary (Jack Halpern) |
| 2467 | Kodansha Kanji Learner’s Dictionary, 2nd Edition (Jack Halpern) |
| 1976 | Les Kanjis dans la tete (Yves Maniette) |
| 10946X | Morohashi |
| 2834 | New Japanese English Character Dictionary (Jack Halpern) |
| 1925 | New Nelson (John Haig) |
| 1957 | Remembering The Kanji (James Heisig) |
| 2107 | Remembering The Kanji, 6th edition (James Heisig) |
| 1623 | Tuttle Kanji Cards (Alexander Kask) |
Jōyō kanji, taught in junior high
JLPT level N1
1551 of 2500 most used kanji in newspapers
Stroke order
On reading compounds
- 愚 【グ】 foolishness, silliness, stupidity, folly, I, me
- 愚痴 【グチ】 idle complaint, grumble, moha (ignorance, folly)
- 軽愚 【ケイグ】 moronity, moron
- 大愚 【タイグ】 great folly or fool
Kun reading compounds
- 愚か 【おろか】 foolish, stupid, silly
- 愚かしい 【おろかしい】 foolish, stupid
Readings
- Korean:
- u
Spanish
- estupidez
- tontería
- prefijo humilde para cosas propias
Portuguese
- tolo
- tolice
- disparate
- estúpidez
French
- stupide
- absurdité
- idiot
- bête
| 3658 | 2001 Kanji |
| 4k9.15 | The Kanji Dictionary |
| 2-9-4 | SKIP code |
| 2-8-4 | SKIP code |
| 6033.2 | Four corner code |
| 1-22-82 | JIS X 0208-1997 kuten code |
| 611a | Unicode hex code |