adj. 25B6; adjective
inadequate water supplies : INSUFFICIENT, deficient, poor, scant, scanty, scarce, sparse, in short supply; paltry, meagre, niggardly, limited; informal measly, pathetic; formal exiguous.
inadequate staff : INCOMPETENT, incapable, unsatisfactory, not up to scratch, unfit, ineffective, ineffectual, inefficient, unskilful, inexpert, inept, amateurish, substandard, poor, useless, inferior; informal not up to snuff; Brit. informal duff, not much cop, no great shakes.
sufficient, competent.