Olympian, Aloof, Apprehensive, Armed, Arrested, Backward, Bashful, Blank, Bridled, Buried, Cagey, Calculating, Canny, Careful, Cautious, Chary, Chilled, Chilly, Circumspect, Cloaked, Cold, Concealed, Undemonstrative, Vigilant, Wary, Watchful, Withdrawn, Considerate, Constrained, Controlled, Cool, Copyrighted, Covered, Covert, Curbed, Custodial, Defended, Deliberate, Detached, Discreet, Distant, Expressionless, Forbidding, Frigid, Frosty, Gingerly, Heedful, Hesitant, Hidden, Icy, Impassive, Impersonal, Inaccessible, Incredulous, Inhibited, Introverted, Invulnerable, Judicious, Lidless, Loath, Mindful, Modest, Obscured, Observant, Patented, Policed, Politic, Privy, Protected, Prudent, Reluctant, Remote, Removed, Repressed, Reserved, Restrained, Retarded, Reticent, Retiring, Safe, Safeguarded, Screened, Sheltered, Shielded, Shrinking, Shrouded, Sleepless, Subdued, Suppressed, Suspecting, Suspicious, Tentative, Thorough, Unadventurous, Unapproachable, Uncommunicative, Uncongenial