adjective
Synonyms: cool 2, collected, composed, disimpassioned, nonchalant, unflappable, unruffled
Related Word: complacent, self-satisfied, smug; unaffected, unmoved, untouched
Contrasted words: discomfited, disconcerted, fazed, rattled; irascible, splenetic, testy
Antonyms: choleric; touchy