후회각

That sinking feeling when you can already tell something is going to end in regret — before it even happens. From 후회 (regret) + 각 (angle/signs of). You know you shouldn't.

후회 = regret

각 = angle / signs of / potential (shortened from '각'도)

See also: 차애각, 칼퇴각, 망각, 야근각