calmar

calmar » to calm

calmar
to calm
eucalmo
você, ele, elacalma
nóscalmamos
vocês, eles, elascalam

CALMAR means to calm, calm down, get calm, be calmed ETC. Also used in a similar way is verb, ACALMAR.
Complete conjugation.

Eu vou tentar calmar a situação. ➜ I'm going to try to calm things down.