This is the 9348th most frequent Korean word.
겨울이
"겨울이" means "winter" (subject form in Korean).
Here, '겨울이' serves as the subject of the sentence indicating 'winter.'
겨울이 돌아오고 있어요.
Winter is coming back.
In this sentence, '겨울이' refers to the season 'winter,' marked for the subject position with the auxiliary verb 'most like'.
나는 겨울이 가장 좋아요.
I like winter the most.
Here, '겨울이' indicates 'when it becomes winter,' providing a time frame for a conditional statement.