First Known Use: circa 1656
Dictionary
je ne sais quoi
noun \zhə-nə-ˌsā-ˈkwä\
: a pleasant quality that is hard to describe
Full Definition of JE NE SAIS QUOI
: something that cannot be adequately described or expressed
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Origin of JE NE SAIS QUOI
French, literally, I know not what
Rhymes with JE NE SAIS QUOI
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