(a.) Indifferent; careless; cool.

Laodicean Olympian aloof apathetic at ease ataractic benumbed blah blase calm careless casual cheerful collected comatose composed cool degage desensitized detached devil-may-care disinterested dispassionate disregardful distant dull easy easygoing effortless free and easy glad happy-go-lucky heartless hebetudinous heedless hopeless imperturbable in a stupor inattentive incurious indifferent inexcitable insouciant lackadaisical languid lethargic light lighthearted listless mindless negligent numb numbed offhand passive perfunctory phlegmatic pluckless pococurante reckless regardless relaxed resigned slack sluggish smooth soporific spiritless spunkless stoic stupefied supine together torpid turned-off unanxious uncaring unconcerned undiscriminating undisturbed unemotional unenthusiastic unexcitable unexcited unflappable uninterested unmindful unperturbed unruffled unsolicitous untroubled withdrawn