1.
If you ~ tears, laughter, or song, you suddenly begin to cry, laugh, or sing.
She ~ tears and ran from the kitchen.
...books that cause adults to ~ helpless laughter.
PHRASAL VERB: V P n, V P n
2.
If you say that something bursts into a particular situation or state, you mean that it suddenly changes into that situation or state.
This weekend’s fighting is threatening to ~ full-scale war...
PHRASAL VERB: V P n
3.
to ~ flames: see flame