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English definition of “je ne sais quoi”

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je ne sais quoi

noun [S] uk   /ˌʒə.nə.seɪˈkwɑː/ us  
French for 'I don't know what': a pleasing quality that cannot be exactly named or described: Although he's not conventionally attractive, he has a certain je ne sais quoi that makes him popular with the ladies.
Translations of “je ne sais quoi”
in Chinese (Traditional) 難以描繪(或表達)的好品質, 妙不可言的特性…
in Chinese (Simplified) 难以描绘(或表达)的好品质, 妙不可言的特性…
(Definition of je ne sais quoi from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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