PHLEGMATIC

adj. 1 phlegmatical, stoic(al), unemotional, unenthusiastic, unanimated, sluggish, apathetic, uninvolved, lethargic, unfeeling, uncaring, cold, unresponsive, stolid, unmoved, insensitive, unaffected, insensible, indifferent, unconcerned, uninterested, listless, torpid, indolent, inactive, passive, Rare hebetudinous Hutton is far too phlegmatic to be stirred by the fervour of the revolutionaries 2 phlegmatical, self-possessed, self-controlled, controlled, restrained, composed, calm, serene, tranquil, placid, cool-headed, equanimous, cool, undisturbed, unperturbed, unruffled, imperturbable, even-tempered, philosophical, temperate, moderate One has to learn to be phlegmatic about things going wrong at the office