1. break in
I have forgotten my keys. Should I break in?
(often no object; with an object, break into-- inseparable): enter by using force (and breaking a lock, window, etc.); "Somebody broke into Jane's apartment while she was at the movies."
he tried to break in a house
He did not know who was trying to break in. How could any man break in here, and you not know? Someone broke into their apartment last night. The factory was broken into during the night and quite a lot of material was stolen.
Be quiet! You really shouldn’t break in when someone is speaking.
He did not know who was trying to break in.