| Verb | 1. | break open - open with force; "He broke open the picnic basket" |
| 2. | break open - come open suddenly and violently, as if from internal pressure; "The bubble burst" pop - burst open with a sharp, explosive sound; "The balloon popped"; "This popcorn pops quickly in the microwave oven" blow - burst suddenly; "The tire blew"; "We blew a tire" come apart, break, split up, fall apart, separate - become separated into pieces or fragments; "The figurine broke"; "The freshly baked loaf fell apart" | |
| 3. | break open - erupt or intensify suddenly; "Unrest erupted in the country"; "Tempers flared at the meeting"; "The crowd irrupted into a burst of patriotism" |