expression, godan verb (-mu)
shut up one's house; close down one's home
Idiomatic expression meaning to permanently close up one's house, often implying moving out or giving up the residence. The verb 畳む (to fold) metaphorically suggests packing up and leaving.
父の死後、実家を畳むことにした。
After my father's death, we decided to shut up the family home.
彼は仕事を辞めて、
He quit his job, closed up his city house, and moved to the countryside.