1. erupt or intensify suddenly

    e.g. Unrest erupted in the country
           Tempers flared at the meeting
           The crowd irrupted into a burst of patriotism

    Synonym: eruptirruptflare upflareburst out

2. come open suddenly and violently, as if from internal pressure

    e.g. The bubble burst

    Synonym: burstsplit

3. open with force

    e.g. He broke open the picnic basket