deficient (adj.)

• adulterated
• amiss
• bad
• base
• blemished
• botched
• bungling
• callow
• clumsy
• damaged
• defective
• embryonic
• erroneous
• failing
• fallible
• faulty
• flawed
• haphazard
• hit-or-miss
• immature
• impaired
• imperfect
• imprecise
• impure
• inaccurate
• inadequate
• incompetent
• incomplete
• inexact
• inferior
• infrequent
• injured
• insufficient
• lacking
• little
• makeshift
• maladroit
• marred
• mean
• mediocre
• messy
• minus
• missing
• mixed
• off
• part
• partial
• patchy
• petty
• promiscuous
• rare
• scant
• scanty
• scarce
• scrappy
• scrimpy
• shabby
• short
• shy
• sketchy
• skimpy
• slipshod
• sloppy
• slovenly
• sluttish
• small
• trivial
• uncommon
• underdeveloped
• undeveloped
• uneven
• unfinished
• unqualified
• unreached
• unsatisfactory
• unsatisfying
• unskillful
• unsound
• untidy
• wanting