Synonyms and related words :
Olympian, above all that, ailing, aloof, backward, bashful, blank, chilled, chilly, cold, constrained, cool, detached, discreet, distant, donsie, exclusive, expressionless, forbidding, frigid, frosty, guarded, icy, impassive, impersonal, inaccessible, indisposed, insociable, introverted, low, mean, modest, off-color, poorly, remote, removed, repressed, reserved, restrained, reticent, retiring, seclusive, shrinking, sickly, solitary, standoff, standoffish, subdued, suppressed, unaffable, unapproachable, unbending, uncongenial, undemonstrative, unexpansive, ungenial, withdrawn