unruffled Synonyms

unflustered tranquil placid unperturbed at ease even-tempered still nonchalant phlegmatic imperturbable untroubled quiet relaxed serene smooth undisturbed sober self-possessed unexcitable calm composed steady cool-headed cool equanimous unflurried collected unperplexed unimpassioned unstirred unshaken unaffected unconcerned unmoved waveless whist windless coolheaded unanimated unagitated at peace laid-back unfazed unflappable emotionless self-controlled steady-handed unbothered undeterred unwrinkled