break (sth) off
(cause sth to) become separated from sth as a result of force or strain (使某物)折断
The door handle has broken off. 门的把手断了.
She broke off a piece of chocolate and gave it to me. 她掰下一块巧克力给我. break sth off end sth suddenly; discontinue sth 突然中止某事物; 中断某事物
break off diplomatic relations (with a country) 中断(与某国的)外交关系
They´ve broken off their engagement/broken it off. 他们已经解除了婚约.