► 成句
人知れず [ひとしれず] meaning: unknown rank: 4
☆ 彼は人知れず努力してきた ⇨ He has been working hard when people are not looking
人知れぬ [ひとしれぬ] meaning: unknown rank: 4
☆ 彼は人知れぬ病気と戦いながら生きてきた ⇨ He has been battling with a disease others knew nothing about
► 名詞
未知 [(1)みち] [liter] meaning: unknown rank: 2
☆ 未知の領域 ⇨
未知数 [(2)みちすう] meaning: unknown rank: 4
☆ 彼の実力は未だ未知数だ ⇨ His real ability is still unknown
► 形容詞
底知れない [そこしれない] meaning: unknown rank: 4
☆ 彼の力は底知れない ⇨ His ability has no known bottom, is limitless
► 連体詞
見知らぬ [みしらぬ] [liter] meaning: unknown rank: 3
☆ 見知らぬ人 ⇨ A person you don’t know. A stranger