것일까

could it be that…?

→ 것
phrase Rare #23,131
could it be that…? Attached to a preceding clause to express wondering or speculation, often in a rhetorical question.
KO: 그게 정말 사실인 것일까?
EN: Could that really be true?

난 왜 사는 것 일까?

Why am I living?

— 베를린 천사의 시 (1987)