aloof • autistic • backward • bashful • blank • chill • chilled • chilly • close • cold • cold-blooded • constrained • controlled • cool • detached • discreet • disinterested • dispassionate • distant • dull • emotionless • exclusive • expressionless • forbidding • frigid • frosty • glacial • guarded • heartless • icy • immovable • impassive • impersonal • inaccessible • incompatible • indifferent • inexcitable • insociable • introverted • isolated • modest • objective • offish • Olympian • quiet • remote • removed • repressed • reserved • restrained • reticent • retiring • seclusive • self-absorbed • shrinking • solitary • spiritless • standoff • standoffish • subdued • suppressed • tranquil • unaffable • unapproachable • uncommunicative • uncompanionable • uncongenial • undemonstrative • unemotional • unexpansive • unfriendly • ungenial • unimpassioned • uninterested • unresponsive • unsociable • unsocial • unsympathetic • untouchable • withdrawn