incompetent
uneconomical
wasteful
artless
careless
half-assed
inadept
inapt
inattentive
incapable
incapable of
ineffective
ineffectual
inefficacious
inept
inexpert
inferior
mediocre
pedestrian
poor
skill-less
slipshod
slovenly
thoughtless
unable
unable to
unapt
undeft
undexterous
undextrous
unendowed
unfacile
unfit
unfitted
ungifted
unintelligent
unprepared
unproficient
unqualified
unskilled
unskillful
untalented
untrained
unworkmanlike
clumsy
confuse
corrupt
frivolous
impractical
inadequate
inappropriate
inconvenient
stupid
tedious
unfair
unreliable
unsafe
unsatisfactory
unstable
unwise
Omniscient
beneficent
coefficient
deficient
efficient
insufficient
omniscient
proficient
self-sufficient
sufficient