become quiet or calm, especially after a state of agitation;
"After the fight both men need to cool off."
"It took a while after the baby was born for things to settle down again."
make calm or still;
"quiet the dragons of worry and fear"
become quiet or less intensive;
"the fighting lulled for a moment"
- The calm sea was dotted with brigs.
- The excited old lady soon calmed down.
- Saeed sat beside him and warned Nuss to stay calm.
- He squeezed her to his breast and calmed her down.
- calm down （使)平静