This is the 4665th most frequent Korean word.
걱정은
"걱정은" means "worry is" or "concern is" in English.
Here, '걱정은' (concerning a worry) is used to emphasize that worrying is unnecessary.
걱정은 필요 없어요.
You don't need to worry.
In this sentence, '걱정은' highlights worries and contrasts them with later hope.
걱정은 지나가고 희망이 찾아오죠.
Worries pass, and hope arrives.
Here, '걱정은' focuses on ceasing an action (worrying) to suggest taking an alternative action.