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• ungenial • unharmonious • uninterested • unresponsive • unsociable • unsocial • unsympathetic • untouchable • withdrawn