부득이 ~게 되다 · 부득이한 사정
unavoidably, inevitably, out of necessity
Example
개인 사정으로 부득이 회의에 참석하지 못했습니다.
Due to personal circumstances, I was unavoidably unable to attend the meeting.
Word parts
부 not+득 obtain+이 stop
Literally 'cannot stop it': there is no other choice.