feckless (adj.)
- aimless
- barren
- bootless
- carefree
- careless
- counterproductive
- easygoing
- effete
- empty
- etiolated
- fatuous
- fruitless
- futile
- good-for-nothing
- happy-go-lucky
- heedless
- impotent
- improvident
- inadequate
- inadvertent
- inane
- incautious
- ineffective
- ineffectual
- inefficacious
- inoperative
- invalid
- irresponsible
- lackadaisical
- meaningless
- negligent
- nonchalant
- nugatory
- pointless
- purposeless
- reckless
- remiss
- shiftless
- sterile
- superfluous
- thoughtless
- thriftless
- unavailing
- uncaring
- undependable
- uneconomical
- unheeding
- unreflective
- unreliable
- unthinking
- untrustworthy
- useless
- vain
- wild
- worthless
