unavailing (adj.)

• abortive
• aimless
• barren
• bootless
• counterproductive
• effete
• empty
• etiolated
• fatuous
• feckless
• fruitless
• futile
• impotent
• inadequate
• inane
• ineffective
• ineffectual
• inefficacious
• inoperative
• invalid
• meaningless
• nugatory
• pointless
• purposeless
• sterile
• superfluous
• unavailable
• unproductive
• useless
• vain