Not producing or capable of producing.

Roget 645: useless, inutile, inefficacious, futile, unavailing, bootless; inoperative etc. 158; inadequate etc. (insufficient) 640; inservient^†, unsubservient; inept, inefficient etc. (impotent) 158; of no avail etc. (use) 644; ineffectual etc. (failure) 732; incompetent etc. (unskillful) 699; stale, flat and unprofitable;" superfluous etc. (redundant) 641; dispensable; thrown away etc. (wasted) 638; abortive etc. (immature) 674.    worthless, valueless, priceless; unsalable; not worth a straw etc. (trifling) 643, dear at any price.    vain, empty, inane; gainless^†, profitless, fruitless; unserviceable, unprofitable; ill-spent; unproductive etc. 169; hors de combat [Fr.]; effete, past work etc. (impaired) 659; obsolete etc. (old) 124; fit for the dust hole; good for nothing; of no earthly use; not worth having, not worth powder and shot; leading to no end, uncalled for; unnecessary, unneeded.    ... show more

Roget 169: unproductive, acarpous^†, inoperative, barren, addled, infertile, unfertile, unprolific^†, arid, sterile, unfruitful, infecund^†; sine prole; fallow; teemless^†, issueless^†, fruitless; unprofitable etc. (useless) 645; null and void, of no effect.    ... show more

Polish: bezproduktywny, nieproduktywny

Not producing desired results.

Polish: bezproduktywny, bezpłodny, czczy, nieproduktywny