(a.) Not showing emotion; expressionless; unmoved\; apathetic; impassible.

Olympian affectless aloof anesthetized apathetic arctic at rest autistic backward bashful blank blunt bored bovine callous calm careless catatonic chill chilled chilly cloistered cold cold as charity cold-blooded coldhearted collected composed constrained contained controlled cool deadpan detached discreet disinterested dispassionate distant drugged dry dull dwindling ebbing emotionally dead emotionless empty even-tempered even-tenored expressionless fishy forbidding frigid frosted frosty frozen glassy guarded halcyon hardened heartless heedless hushed icy immovable impassible impersonal imperturbable inaccessible incurious indifferent indurated inexcitable inexpressive inirritable insensible insensitive insentient insouciant insusceptible introverted isolated lackadaisical listless matter-of-fact mindless modest moldering nonchalant nonemotional objective obtuse offish out of touch pacific passionless patient peaceable peaceful phlegmatic placid poker-faced quiescent quiet regardless remote removed reposeful reposing repressed reserved restful resting restrained reticent retiring secluded self-absorbed sequestered sequestrated serene sheltered shrinking smooth soulless spiritless standoff standoffish steady still still as death stillish stilly stoic stoical stolid stony subdued subsiding suppressed taciturn tranquil unaffable unaffectionate unagitated unapproachable uncaring unconcerned uncongenial undemonstrative undisturbable undisturbed unemotional unexcitable unexpansive unexpressive unfeeling unflappable ungenial unimpassioned unimpressible unimpressionable uninquiring uninterested uninvolved unirritable unloving unmindful unmoved unnervous unpassionate unperturbed unresponding unresponsive unruffled unstirring unsusceptible unsympathetic untouchable untroubled vacant waning withdrawn wooden