음흉해요 · 음흉했어요 · 음흉한 (+noun)
sly, sinister, scheming
Example
그 사람의 음흉한 웃음이 왠지 기분 나빴어요.
That person's sly grin made me feel uneasy somehow.
Word parts
음 shady+흉 evil
Literally 'shady and evil' — hiding bad intentions.
Good to know
Also used jokingly or seriously for lecherous looks: 음흉한 눈빛 'a creepy, leering gaze'.
Related words