Synonyms and related words :
afraid, anxious, apprehensive, dangerous, desultory, dickey, disconcerted, doubtful, dubious, exposed, fearful, flimsy, fluctuant, frail, hazardous, hesitant, in suspense, infirm, insubstantial, jumpy, nervous, open, perilous, precarious, provisional, questioning, rickety, risky, rocky, rootless, shaky, shifting, shifty, slippery, temporary, tentative, ticklish, tottery, treacherous, unassured, uncertain, uncomfortable, unconfident, undefended, undependable, unfaithworthy, unguarded, unhealthy, unnerved, unpredictable, unprotected, unreliable, unsafe, unselfassured, unselfconfident, unselfreliant, unsolid, unsound, unstable, unsteadfast, unsteady, unsubstantial, unsure, untrustworthy, vacillating, vulnerable, wavering, weak, wobbly, worried