This is the 17916th most frequent Russian word.
уходило
"Уходило" means "was leaving" or "went away" (past tense, neutral gender).
In this usage, "уходило" metaphorically represents the passing or flow of time.
Время быстро уходило, пока мы обсуждали планы.
Time quickly passed while we were discussing plans.
Here, "уходило" refers to the action of the sun moving away or setting, implying a gradual and continuous movement.
Солнце уходило за горизонт, оставляя небо румяным.
The sun was setting behind the horizon, leaving the sky ruddy.
"Уходило" here describes the birds' action of departing or moving away to the south.