meaningless

absurd empty futile hollow inconsequential insignificant pointless senseless trivial unimportant useless vague worthless

aimless blank doesn't cut it double-talk doublespeak feckless fustian good-for-nothing hot air inane insubstantial nonsensical nothing nugatory purportless purposeless trifling unmeaning unpurposed vacant vain valueless vapid

certain consequential fruitful full important meaningful productive profitable rational reasonable sensible significant substantial useful valuable wise worthwhile