afraid, agnostic, ambiguous, ambivalent, averse, backward, bashful, boggling, canny, capricious, careful, cautious, chancy, changeable, circumspect, deliberate, demurring, dicey, diffident, discreet, dithering, doubting, equivocal, erratic, faltering, fickle, fluctuating, gingerly, guarded, halting, heedful, hesitating, incalculable, indecisive, indefinite, indemonstrable, indisposed, irresolute, jibbing, judicious, leaving out nothing, loath, mindful, modest, noncommittal, of two minds, on guard, overlooking no possibility, pause, pawky, politic, polysemous, prudent, qualmish, regardful, reluctant, safe, scrupling, scrupulous, shilly-shallying, shrinking, shy, skeptical, slow to act, squeamish, stammering, sticking, stickling, straining, stuttering, tentative, thorough, timid, touch-and-go, unaccountable, unadventurous, uncertain, uncommunicative, unconfirmable, unconvinced, undaring, undecided, undivinable, uneager, unenterprising, unforeseeable, unpersuaded, unprecipitate, unpredictable, unprovable, unresolved, unsettled, unsure, unverifiable, unwilling, vacillating, vacillatory, variable, wavering, whimsical, wobbly