前所未闻 (qián suǒ wèi wén) — unheard-of, unprecedented

Definition

Strongly formal chengyu meaning 'unheard-of, unprecedented' — a situation or event that has never been heard of before, used in written or rhetorical contexts rather than casual speech.

idiom

unheard-ofunprecedented

Examples

前所未闻，。
Zhè jiàn shì zhēn shì qián suǒ wèi wén, ràng rén nán yǐ zhì xìn.
This matter is truly unheard-of, hard to believe.
前所未闻。
Tā tí chū le yí gè qián suǒ wèi wén de jiàn yì.
He made an unprecedented suggestion.
前所未闻。
Zhè zhǒng qián suǒ wèi wén de xiàn xiàng yǐn qǐ le kē xué jiā de zhù yì.
This unprecedented phenomenon attracted scientists' attention.

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