권태가 · 권태를
boredom, weariness, ennui
Example
매일 같은 일을 하다 보니 권태를 느끼게 되었어요.
Doing the same thing every day, I started to feel weary of it.
Word parts
권 weary+태 idle
Literally 'weary and idle'.
Good to know
Couples talk about 권태기, the stage when a relationship feels stale and routine.