Synonyms and related words :
afraid, apprehensive, bashful, cautious, chicken, chickenhearted, confused, conscious, coward, cowardly, cowed, coy, craven, daunted, demure, demurring, diffident, dismayed, fainthearted, faltering, fearful, fearing, fearsome, frightened, funking, funky, goosy, gutless, henhearted, hesitant, hesitating, humble, in fear, inarticulate, intimidated, jibbing, jumpy, lily-livered, milk-livered, milksoppish, milksoppy, modest, mousy, nervous, overtimid, overtimorous, panic-prone, panicky, pigeonhearted, pusillanimous, rabbity, retiring, scared, scary, scrupling, self-conscious, shaky, shamefaced, shamefast, shilly-shallying, shivery, shrinking, shy, sissified, sissy, skittery, skittish, soft, stammering, startlish, sticking, stickling, straining, tentative, timorous, trembling, tremulous, trepidant, trigger-happy, unassertive, unassured, unmanly, unmanned, weak, weak-kneed, weakhearted, white-livered, yellow