| 汗知らず | prickly heat powder, baby powder, talc powder |
| 世間知らず | ignorant of the ways of the world |
言い知れぬ 言知れぬ | indescribable, inexpressible |
露知らず つゆ知らず | utterly ignorant, not knowing, having no idea, (being a) blithering idiot |
| 知り抜く | to know thoroughly |
| 通知簿 | report card (book) |
| 味わい知る | to taste and know |
| 女の味を知る | to have carnal knowledge (of a woman) |
| 格物致知 | gaining a perfect knowledge of natural laws |
知ろしめす 知ろし召す 知ろし食す | to know, to reign |
| 人知を超えた | beyond human understanding |
たかが知れている 高が知れている | to not amount to much |
| 知余って勇足らず | lacking boldness by being too sagacious, being too sagacious to be bold |
| 知恵遅れ | mental retardation |
| 知覚知 | knowledge by acquaintance |
| 知識層 | the intellectual class |
| 知識の泉 | source of knowledge |
| 知識を蓄える | to gain knowledge |
| 知情意 | emotion and volition, intellect |
| 悪知恵 | craft, cunning, guile, serpentine wisdom |
| 言語知識 | knowledge of language |
| 科学知識 | scientific knowledge |
| 火災報知器 | fire alarm (box) |
| 感知装置 | smoke or heat sensor or detector |
| 専門的知識 | expert (technical) knowledge, expertise |
| 知識体系 | body of knowledge |
| 知日派 | pro-Japanese (group) |
| 通知状 | notice, letter of advice |
| 転居通知 | change of address notice (announcement) |
| 認知心理学 | cognitive psychology |
| 納税通知書 | tax notice |
| 奸知 | cunning, craft, wiles |
| 知財 | intellectual property, IP |
| 煙感知器 | smoke detector |
| 未知語 | unknown language, unknown word |
| 豆知識 | trivia, bits of knowledge |
| 音波水中探知機 | sonar |
| 世界知的所有権機関 | World Intellectual Property Organization (Organisation), WIPO |
| 認知行動療法 | cognitive-behavioral therapy, cognitive-behavioural therapy |
| 認知療法 | cognitive therapy |
| 何か知ら | somehow or other, something or other |
| 知らす | to reign, to notify |
知らず 不知 | I know not whether, I know not if |
| 解雇通知 | dismissal notice, pink slip (US) |
| 知恵の輪 | exercise where students link crossed hands in a circle and try working together and without letting go, wire puzzle |
検知 見知 | detection |
| 機知縦横 | being very witty, very ingenious and resourceful |
| 世間周知 | common knowledge, widely known, known to everybody |
| 知己朋友 | intimate friends and acquaintances |