break in

verbs

enter someone's (virtual or real) property in an unauthorized manner, usually with the intent to steal or commit a violent act
"Someone broke in while I was on vacation"; "They broke into my car and stole my radio!"; "who broke into my account last night?"
is derived from
break into a conversation
"her husband always chimes in, even when he is not involved in the conversation"
start in a certain activity, enterprise, or role
is a type of (narrower)
take the first step or steps in carrying out an action
"We began working at dawn"; "Who will start?"; "Get working as soon as the sun rises!"; "The first tourists began to arrive in Cambodia"; "He began early in the day"; "Let's get down to work now"
intrude on uninvited
"The nosy couple broke in on our conversation"
is a type of (narrower)
enter uninvited
"They intruded on our dinner party"; "She irrupted into our sitting room"
break so as to fall inward
"He broke in the door"
is a type of (narrower)
destroy the integrity of; usually by force; cause to separate into pieces or fragments
"He broke the glass plate"; "She broke the match"
make submissive, obedient, or useful
"The horse was tough to break"; "I broke in the new intern"