This is the 229th most frequent Persian word.
جای
"جای" means "place" or "spot" in English.
Here, 'جای' refers to a location or spot indicated by 'my'.
این جای من است.
This is my place.
In this sentence, 'جای' is used to imply substitution or taking someone's place.
او به جای من رفت.
He went instead of me.
Here, 'جای' denotes a figurative space associated with a honor or reward.