aloof • apathetic • autistic • backward • bashful • blank • blunt • chill • chilled • chilly • cold • cold-blooded • constrained • controlled • cool • detached • discreet • disinterested • dispassionate • distant • dull • emotionless • exclusive • expressionless • forbidding • frigid • frosty • guarded • heartless • icy • impassive • impersonal • inaccessible • indifferent • inexcitable • introverted • Laodicean • moderate • modest • neutral • objective • offish • Olympian • passive • phlegmatic • quiet • remote • removed • repressed • reserved • restrained • reticent • retiring • seclusive • self-absorbed • shrinking • spiritless • standoff • standoffish • stolid • subdued • suppressed • temperate • unaffable • unapproachable • unconcerned • uncongenial • undemonstrative • unemotional • unexpansive • unfeeling • unfriendly • ungenial • unimpassioned • uninterested • unresponsive • unsociable • unsympathetic • untouchable • withdrawn