serene Synonyms

tranquil calm unagitated unmoved unruffled waveless windless unshaken unmolested undisturbed unalarming at peace loose-fitting laid-back sedate temperate self-assured self-contained self-possessed smooth soundless staid steady still stilly stoical stolid stormless easygoing level-headed even-tempered unexcitable untroubled unflappable self-controlled uncomplaining unemotional unexcited unflurried unflustered unperturbed unshadowed at ease shhh levelheaded unclouded longanimous carefree happy-go-lucky unworried