abortive (adj.)

• barren
• bootless
• failing
• fruitless
• futile
• immature
• ineffective
• ineffectual
• inefficacious
• lame
• manque
• otiose
• profitless
• sterile
• stillborn
• unavailable
• unavailing
• unformed
• unfortunate
• unproductive
• unprofitable
• unremunerative
• unrewarding
• unripe
• unsuccessful
• useless
• vain