nugatory (adj.)

• airy
• asinine
• barren
• bootless
• catchpenny
• cheap
• counterproductive
• effete
• empty
• etiolated
• fatuous
• feckless
• flimsy
• foolish
• frivolous
• frothy
• fruitless
• futile
• good-for-naught
• good-for-nothing
• hollow
• idle
• inadequate
• inane
• ineffective
• ineffectual
• inefficacious
• inoperative
• invalid
• light
• no-account
• no-good
• otiose
• shabby
• shallow
• shoddy
• silly
• slender
• slight
• sterile
• superficial
• trashy
• trifling
• trite
• trivial
• unavailing
• useless
• vacuous
• vain
• valueless
• vapid
• windy
• worthless