useless (adj.)
- abortive
- aimless
- barren
- bootless
- counterproductive
- deleterious
- detrimental
- disadvantageous
- effete
- empty
- etiolated
- failing
- fatuous
- feckless
- fruitless
- futile
- good-for-nothing
- harmful
- hopeless
- idle
- impotent
- impracticable
- impractical
- inadequate
- inane
- incompetent
- ineffective
- ineffectual
- inefficacious
- inefficient
- inept
- injurious
- inoperative
- inutile
- invalid
- lame
- manque
- meaningless
- nonfunctional
- nugatory
- pointless
- prejudicial
- purposeless
- sterile
- stillborn
- superfluous
- unavailable
- unavailing
- unfavorable
- unfortunate
- unproductive
- unprofitable
- unrewarding
- unserviceable
- unsuccessful
- unusable
- unworkable
- vain
- worthless
An idler is a watch that wants both hands,
As useless if it goes as if it stands.
Where none admire, 't is useless to excel;
Where none are beaux, 't is vain to be a belle.