je ne sais quoi

1. 1.

   something indescribable

   Broaderobject

Questions about je ne sais quoi

What does je ne sais quoi mean?

je ne sais quoi means "something indescribable".

Is je ne sais quoi a common word?

je ne sais quoi is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.