impassive

Synonyms: apathetic callous cold cold-blooded collected composed dispassionate dry emotionless hardened heartless imperturbable indifferent indurated inexcitable inexpressive inscrutable insensible insusceptible matter-of-fact nonchalant passionless phlegmatic placid poker-faced reserved reticent sedate self-contained serene spiritless stoic stoical stolid taciturn unconcerned unemotional unexcitable unfeeling unflappable unimpressible unmoved unruffled wooden

Antonyms: emotional feeling passionate responsive sensitive susceptible warm