insufficient

not coming up to an expected measure or meeting a particular need there's been an insufficient number of volunteers for the job, so I'll have to select someone Synonyms deficient, inadequate, short, lacking, low, scarce, shy, wantingRelated Words substandard, unacceptable, unsatisfactory; hand-to-mouth, lean, light, meager (or meagre), niggardly, poor, scant, scanty, skimp, skimpy, slender, slim, spare, sparse, stingy; bare, mere, minimum; slight, smallNear Antonyms abundant, ample, bounteous, bountiful, copious, generous, liberal, plenteous, plentiful, plentitudinous; enlarged, expanded, supplemented; abounding, overflowing, teeming; satisfactory, tolerable; lavish, luxuriant, rich; big, considerable, hefty, jumbo, king-size (or king-sized), large, largish, oversize (or oversized), sizable (or sizeable), substantial, superAntonyms adequate, enough, sufficient