오리무중이 · 오리무중을
shrouded in mystery, completely in the dark
Example
경찰이 계속 찾고 있지만 범인은 아직도 오리무중입니다.
The police keep searching, but the culprit's whereabouts are still a complete mystery.
Word parts
오 five+리 mile+무 fog+중 middle
Literally 'in the middle of a fog five miles wide' — no way to see.
Related words