(a.) Not adequate; unequal to the purpose; insufficient\; deficient; as, inadequate resources, power, conceptions, representations, etc.

adulterated arrested asymmetric barren base blemished bootless callow counterproductive damaged defective deficient disappointing disheartening disparate displeasing disproportionate dissatisfactory effete emasculate embryonic empty erroneous etiolated failing fallible fatuitous fatuous faulty feckless forceless found wanting fruitless futile half-assed hypoplastic ill-matched ill-qualified ill-sorted immature impaired imperfect impotent imprecise impure in arrear in arrears in default in short supply inaccurate inane inappreciable incapable incommensurate incompetent incomplete inconsiderable ineffective ineffectual inefficacious inexact infant inferior inoperative insufficient invalid invertebrate irregular lacking little makeshift maladjusted maladroit mean mediocre minus mismatched missing mixed needing not comparable not enough not equal to not good enough not in it not perfect not up to nugacious nugatory odd of no force off out of it out of proportion part partial patchy petty scant scanty scarce scrappy scrimpy shabby short short of shy sketchy skew skewed skimpy small spineless sterile too little trivial unable unadapted unadjusted unavailing underdeveloped undeveloped unequal unequal to unequipped uneven unfinished unfit unfitted unfulfilling ungratifying unperfected unqualified unreached unsatisfactory unsatisfying unskillful unsound unsufficing unthorough useless vain wanting weak