前代未聞

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Japanese[edit]

Kanji in this term
ぜん
Grade: 2
だい
Grade: 3

Grade: 4
もん
Grade: 2
on'yomi

Noun[edit]

前代未聞 (hiragana ぜんだいみもん, romaji zendaimimon)

  1. (idiomatic) An unheard of, unprecedented issue.