inadequate (adj.)

• adulterated
• asymmetric
• barren
• base
• blemished
• bootless
• callow
• counterproductive
• damaged
• defective
• deficient
• disappointing
• disheartening
• disparate
• displeasing
• disproportionate
• dissatisfactory
• effete
• emasculate
• embryonic
• empty
• erroneous
• etiolated
• failing
• fallible
• fatuous
• faulty
• feckless
• forceless
• fruitless
• futile
• ill-sorted
• immature
• impaired
• imperfect
• impotent
• imprecise
• impure
• inaccurate
• inane
• inappreciable
• incapable
• incommensurate
• incompetent
• incomplete
• inconsiderable
• ineffective
• ineffectual
• inefficacious
• inexact
• inferior
• inoperative
• insufficient
• invalid
• invertebrate
• irregular
• lacking
• little
• makeshift
• maladjusted
• maladroit
• mean
• mediocre
• minus
• mismatched
• missing
• mixed
• nugatory
• odd
• off
• part
• partial
• patchy
• petty
• scant
• scanty
• scarce
• scrappy
• scrimpy
• shabby
• short
• shy
• sketchy
• skew
• skewed
• skimpy
• small
• spineless
• sterile
• trivial
• unable
• unadapted
• unadjusted
• unavailing
• underdeveloped
• undeveloped
• unequal
• unequipped
• uneven
• unfinished
• unfit
• ungratifying
• unqualified
• unreached
• unsatisfactory
• unsatisfying
• unskillful
• unsound
• useless
• vain
• wanting
• weak