This is the 952nd most frequent Persian word.
همسرش
"His/her spouse."
The word 'همسرش' here means 'his wife,' showing possession and referring to the spouse of the male subject.
او با همسرش به پارک رفت.
He went to the park with his wife.
In this sentence, 'همسرش' is used to indicate 'his spouse,' referring to the author of the book and indicating marital connection.
کتابی که همسرش نوشته بود، جایزه برد.
The book that his spouse wrote won an award.
Here, 'همسرش' again means 'his spouse,' highlighting the individual married to the person in the context and their actions.