to laugh
Ella solía reírse de mis chistes aunque no fueran graciosos.
She used to laugh at my jokes even if they weren't funny.
La gente solía reírse de él a sus espaldas.
People used to laugh at him behind his back.
De repente empezaron a reírse.
Suddenly they started laughing.
He does nothing but laugh.
Él no pudo evitar reírse de ello.
He couldn't help laughing about it.