This is the 13236th most frequent Turkish word.
kayınpederin
"Kayınpederin" means "your father-in-law" in English.
Kayınpederin is used as 'your father-in-law' in this possessive usage referring to the person's relative.
Dün, kayınpederin bize misafir oldu.
Yesterday, your father-in-law visited us.
Kayınpederin functions as a possessive form indicating that the advice is given by 'your father-in-law'.
Kayınpederin verdiği öğütleri dinlemek istiyorum.
I want to listen to the advice given by your father-in-law.
Kayınpederin is again possessive, highlighting qualities of 'your father-in-law'.