예민해요 · 예민했어요 · 예민한 (+noun)
sensitive, touchy; sharp (of the senses)
Example
시험 전에는 제가 좀 예민해져요.
I get a little touchy before exams.
Word parts
예 sharp+민 quick
Literally 'sharp and quick': nerves or senses that react fast.
Good to know
예민하다 often means irritable or on edge, not 'sensitive' in the caring sense.