This is the 13112th most frequent Turkish word.
karısını
"Karısını" means "his/her wife" in English.
Here, 'karısını' serves as the object of the verb 'üzmemek', meaning 'not to upset', and indicates possession.
O, karısını hiç üzmemek için elinden geleni yapıyor.
He does his best not to upset his wife.
In this example, 'karısını' again acts as the object, part of the phrase specifying possession and the person being searched for.
Kardeşi, karısını arıyordu ama telefonu kapalıymış.
His brother was looking for his wife, but her phone was turned off.
In this sentence, 'karısını' is the accusative form of 'karı', meaning 'wife', showing possession and being the object of the verb.