adjective
1.
Synonyms: calm 2, composed, easy, easygoing, placid, poised, possessed, self-possessed, serene, tranquil
Related Word: peaceful, quiet, still
Antonyms: distraught
2.
Synonyms: cool 2, composed, disimpassioned, imperturbable, nonchalant, unflappable, unruffled
Related Word: assured, confident, sanguine, sure; complacent, self-satisfied, smug
Contrasted words: disordered, troubled