This is the 876th most frequent Persian word.
گذاشت
"گذاشت" means "put," "placed," or "left" (past tense).
In this sentence, 'گذاشت' is used as the past tense of 'to place', indicating an action of putting something somewhere.
او کتاب را روی میز گذاشت.
He/she placed the book on the table.
Here, 'گذاشت' means 'let', expressing permission or allowance for something to happen.
او تصمیم سختی گرفت و گذاشت تا مشکلات حل شوند.
He/she made a tough decision and let the problems resolve on their own.
In this context, 'گذاشت' is part of the phrase 'پشت سر گذاشتن', which means 'to leave behind', reflecting the idea of moving past something.