make submissive, obedient, or useful; "The horse was tough to break"; "I broke in the new intern"
break so as to call inward; "He broke in the door"
start in a certain activity, enterprise, or role
intrude on uninvited; "The nosy couple broke in on our conversation"
enter someone's 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!"
add by mixing or blending on or attaching; "work in the butter and the dough will get the right consistency"; "In his speech, the presidential candidate worked in a lot of learned words"