unfruitful
abortion
barren
bootless
failed
failing
fruitless
futile
gainless
immature
ineffective
ineffectual
inefficacious
lame
manque
miscarried
miscarrying
nonremunerative
of no effect
otiose
profitless
rewardless
rudimentary
sterile
stickit
stillborn
successless
unavailable
unavailing
unformed
unfortunate
unmatured
unproductive
unprofitable
unremunerative
unrewarding
unripe
unsuccessful
useless
vain
abortifacient
arduous
chimerical
concerted
disastrous
full-scale
ill-advised
ill-fated
impending
impotent
impracticable
incipient
large-scale
piratical
pointless
purposeless
spasmodic
sporadic
treasonable
supportive