verb/reˈiɾ/
to laugh
“¿De qué te ríes?” — What are you laughing at/about?
Related: reír a boca llena, reírse a carcajadas, reírse de los peces de colores
Inherited from Vulgar Latin *rīdīre (with dissimilation?), from Latin rīdēre. The perfect system and past participle were changed; the expected preterite indicative would be *rese or *rise with the expected past participle being *reso or *riso.