This is the 7266th most frequent Korean word.
지는
"지는" means "losing" or "setting" depending on the context.
The word '지는' is used here as a progressive verb form of '지다', meaning 'to set' (in the context of the sun).
해가 저녁에 지는 모습을 보았어요.
I saw the sun setting in the evening.
In this sentence, '지는' is describing the action of shadows forming or extending as a continuous action.
그림자가 길게 지는 시간이 되었어요.
It became the time when shadows become long.
'지는' is used here to describe the progressive diminishment or fading of color.