soothe
[ sooth ]
to tranquilize or calm (a person or their emotions); relieve, comfort, or refresh
USE 1
He used his calm and reassuring voice to soothe his friend during the stressful exam period.
USE 2
A warm cup of tea always helped to soothe her nerves after a long day at work.
USE 3
The gentle melody of the lullaby was enough to soothe the crying baby into a peaceful sleep.