The quality of having no practical use.

synoniemen: unusefulness, uselessness.

Roget 645: inutility; uselessness etc. adj.; inefficacy^†, futility; ineptitude, inaptitude; unsubservience^†; inadequacy etc. (insufficiency) 640; inefficiency, etc. (incompetence) 158; unskillfulness etc. 699; disservice; unfruitfulness etc. (unproductiveness).. 169; labor in vain, labor lost, labor of Sisyphus; lost trouble, lost labor; work of Penelope; sleeveless errand, wild goose chase, mere farce.    tautology etc. (repetition) 104; supererogation etc. (redundancy) 641.    vanitas vanitatum [Lat.], vanity, inanity, worthlessness, nugacity^†; triviality etc. (unimportance) 643.    caput mortuum [Lat.], waste paper, dead letter; blunt tool.    litter, rubbish, junk, lumber, odds and ends, cast-off clothes; button top; shoddy; rags, orts^†, trash, refuse, sweepings, scourings, offscourings^†, waste, rubble, debris, detritus; stubble, leavings; broken meat; dregs etc. (dirt) 653; weeds, tares; rubbish heap, dust hole; rudera^†, deads^†.    fruges consumere natus [Lat.] [Horace]. etc. (drone) 683 ... meer laten zien

Roget 647: inexpedience, inexpediency; undesirableness, undesirability etc. adj.; discommodity^†, impropriety; unfitness etc. (disagreement) 24; inutility etc. 645; disadvantage.    ... meer laten zien

Nederlands: nutteloosheid
Pools: nieużyteczność, nieprzydatność, bezużyteczność, niezdatność