burst
/ˈbərst/
verb
to break open, apart, or into pieces usually from impact or from pressure from within
to give way from an excess of emotion
to give vent suddenly to a repressed emotion
the balloon burst
noun
a sudden outbreak; especially : a vehement outburst (as of emotion)
explosion, eruption
a sudden intense effort
a burst of flames
a burst of violence
idiom
to suddenly enter a room and interrupt (someone or something)
They just burst in on us without even knocking on the door.