Synonyms and related words :
Olympian, aloof, arrested, backward, bashful, blank, bridled, chastened, chilled, chilly, cold, controlled, cool, curbed, detached, discreet, distant, expressionless, forbidding, frigid, frosty, guarded, hushed, icy, impassive, impersonal, in check, in control, in hand, in leading strings, in remission, inaccessible, incommunicable, inhibited, introverted, limited, modest, noncommittal, offish, on leash, pent-up, quelled, quiet, remote, removed, repressed, reserved, restrained, retarded, reticent, retiring, shrinking, slowed down, softened, stable, standoff, standoffish, subdued, suppressed, tempered, unaffable, unapproachable, uncongenial, undemonstrative, under control, under discipline, under restraint, unexpansive, ungenial, withdrawn,