Synonyms of simmer down in English:

simmer down


See UK English definition of simmer

phrase

1‘he stormed out of the theatre in a rage but soon simmered down’

SYNONYMS
become less angry, cool off, cool down, be placated, let someone smooth one's ruffled feathers, contain oneself, control oneself, become calmer, calm down, become quieter, loosen up, settle, settle down
British quieten down
North American quiet down
ANTONYMS

get steamed up