je ne sais quoiEnglishOxford New American Dictionaryje ne sais quoi /ˌZHə nə sā ˈkwä, ˌʒə nə seɪ ˈkwɑ / ▸ noun a quality that cannot be described or named easily: that je ne sais quoi that makes a professional. – ORIGIN French, literally ‘I do not know what’.
EnglishOxford New American DictionaryEnglishOxford New American Dictionary
EnglishOxford New American Dictionary