Je ne sais quoi
01
何とも言えない魅力
an intangible quality that makes someone or something attractive, appealing, or intriguing, but which is difficult to describe or define
例
Her smile had a certain je ne sais quoi that lit up the room.
彼女の笑顔には、部屋を明るく照らすある種の je ne sais quoi があった。
