break open in WordNet English dictionary

1. erupt or intensify suddenly
   "Unrest erupted in the country"; "Tempers flared at the meeting"; "The crowd irrupted into a burst of patriotism"
   erupt  irrupt  flare up  flare  break open  burst out 
   
2. come open suddenly and violently, as if from internal pressure
   "The bubble burst"
   burst  split  break open 
   
3. open with force
   "He broke open the picnic basket"
   break open