calmar.

to calm, to still (to limit and lessen in motion and disturbance)

to calm, soothe, assuage, to ease, to appease, to quell, to allay, to settle, to relieve (to make lessen in intensity)

to defuse (e.g. a situation or problem, tension or conflict, a crisis)

to quench, to quell (one's thirst)

to cool

to talk down, to talk off the ledge

to subside, abate

to steady (often used when talking to an animal one is riding like a horse)

to calm down, to settle down, to quiet down, to calm oneself

to cool off, to cool it, to chill, to chill out

to subside