unproductive
1 basket case, bootless, fruitless, futile, idle, ineffective, inefficacious, otiose, unavailing, unprofitable, unremunerative, unrewarding, useless, vain, valueless, worthless
2 barren, dry, fruitless, sterile, unprolific
1 effective, fruitful, profitable, remunerative, rewarding, useful, worthwhile
2 abundant, fertile, fruitful, productive, prolific