멘털이 · 멘털을
mental state, mental toughness
Example
그 선수는 멘털이 강해서 실수해도 금방 회복해요.
That athlete is mentally tough, so he recovers quickly even after a mistake.
Word parts
From English 'mental', used as a noun meaning mindset, a Konglish twist. Often spelled 멘탈.
Good to know
멘털이 강하다/약하다 means mentally tough/fragile; the slang 멘붕 is short for 멘털 붕괴.