estallar
/estaˈʝaɾ/ · B1 · verb
to explode, to blow up, to burst
💥🎈 From astillar, to splinter: something bursts into splinters
Estallar comes from astillar, to shatter into astillas (splinters). Things that estallar burst apart: a balloon, a bomb, a whip-crack. A war or riot that estalla breaks out suddenly, the same way.