cool_off
1. [ verb ] become quiet or calm, esp. after a state of agitation
Synonyms: calm_down settle_down simmer_down chill_out cool_it calm
Examples:

"After the fight both men need to cool off." "It took a while after the baby was born for things to settle down again."

Related terms: change_state composure
2. [ verb ] lose intensity
Synonyms: cool_down cool
Examples:

"His enthusiasm cooled considerably"

Related terms: change
3. [ verb ] feel less enamoured of something or somebody
Related terms: feel
Similar spelling:   Collopy