This is the 1116th most frequent Korean word.
끝까지
"끝까지" means "until the end" or "to the end."
끝까지 here refers to persevering or persisting until the very end of an endeavor.
그는 끝까지 포기하지 않았다.
He never gave up until the end.
끝까지 in this context means to sustain attention or action till the completion of the matter being addressed.
끝까지 들으세요.
Please listen until the end.
끝까지 is used to convey continuity or existence until a final point in time.