break off
verb.
interrupt before its natural or planned end
We had to cut short our vacation
Synonym: break short, cut short
verb.
prevent completion
stop the project|break off the negotiations
Synonym: break, discontinue, stop
verb.
break off (a piece from a whole)
Her tooth chipped
Synonym: break away, chip, chip off, come off
verb.
break a piece from a whole
break a branch from a tree
Synonym: break, snap off
verb.
break a small piece off from
chip the glass|chip a tooth
Synonym: knap, cut off, chip