처가가 · 처가를
wife's family, in-laws' home (from the husband's view)
Example
주말에 아내와 같이 처가에 다녀왔어요.
I visited my wife's family with her over the weekend.
Word parts
처 wife+가 family
Literally 'wife's house.' 처- marks the wife's side: 처남, 처제.
Good to know
The polite form is 처가댁; 처갓집 is a common everyday variant.