This is the 8901st most frequent Russian word.
пройдет
"Пройдет" means "will pass" or "will go through."
Here, 'пройдет' is used in the meaning of 'to pass', indicating the end of an event, specifically the rain stopping.
Дождь пройдет через час.
The rain will pass in an hour.
In this context, 'пройдет' is used figuratively to indicate enduring through challenges or scrutiny.
Этот план пройдет испытание временем.
This plan will stand the test of time.
Here, 'пройдет' means 'to elapse' or 'to go by', referring to the passage of time.