Synonyms and related words :
abashed, arrested, bridled, cold, constrained, controlled, curbed, embarrassed, guarded, in check, in leading strings, in remission, on leash, passionless, pent-up, repressed, reserved, restrained, retarded, reticent, self-conscious, shy, slowed down, under control, under discipline, under restraint, undersexed, unresponsive, uptight