adjective
1.
Synonyms: calm 2, collected, easy, easygoing, placid, poised, possessed, self-possessed, serene, tranquil
2.
Synonyms: cool 2, collected, disimpassioned, imperturbable, nonchalant, unflappable, unruffled
Related Word: quiet, still; sedate, serious, staid; repressed, suppressed
Contrasted words: concerned, worried
Antonyms: discomposed, ruffled