- calm, serene, tranquil - characterized by absence of emotional agitation; "calm acceptance of the inevitable"; "remained serene in the midst of turbulence"; "a serene expression on her face"; "she became more tranquil"; "tranquil life in the country"
Antonym: unpeaceful (indirect, via peaceful)
- serene - completely clear and fine; "serene skies and a bright blue sea"
Antonym: cloudy (indirect, via clear)