dissolve intosomething
phrasal verbwithdissolveverb[I/T]us/dɪˈzɑlv/
tochangefrom oneconditionto another,esp. as aresultof alossofcontrol:
The littlegirldissolved intotearsafter herdrawingwastornup.
Sheknewif shelookedat herfriendthat she’d dissolve intolaughter(=losecontrolof heremotionsandbeginlaughing).