Synonyms and related words :
Olympian, abashed, aloof, autistic, awkward, backward, blank, blushful, boggling, chilled, chilly, close, cold, confused, conscious, constrained, cool, cowardly, coy, demure, demurring, detached, diffident, discreet, dissociable, distant, embarrassed, expressionless, faltering, fearful, fearing, fearsome, forbidding, frigid, frosty, goosy, guarded, hesitant, hesitating, icy, ill at ease, impassive, impersonal, in a tizzy, in fear, inaccessible, inarticulate, incompatible, insociable, introverted, jumpy, meek, modest, mopey, mopish, morose, mousy, nervous, nongregarious, offish, qualmish, rabbity, recoiling, remote, removed, repressed, reserved, restrained, reticent, retiring, scary, scrupulous, self-conscious, self-contained, self-effacing, self-sufficient, shaky, shamefaced, shamefast, sheepish, shivery, shrinking, shy, skittery, skittish, snug, socially incompatible, squeamish, stammering, standoff, standoffish, startlish, stickling, subdued, sullen, suppressed, timid, timorous, trembling, tremulous, trepidant, trigger-happy, unaffable, unapproachable, unassertive, unassuming, unassured, unclubbable, uncomfortable, uncommunicative, uncompanionable, unconfident, uncongenial, undemonstrative, uneasy, unexpansive, unfriendly, ungenial, unostentatious, unsociable, unsocial, withdrawn,