bungling
clumsy
ill
inapt
poor
skilless
unpracticed
unskillful
amateurish
cleverest
diligent
ill-judged
illiterate
inattentive
incautious
incompetent
indiscreet
inept
inexperienced
injudicious
negligent
presumptuous
remiss
skilful
unconvincing
uninformed
unskilled
unwary
unwise
venturesome
clever
skillful