pithless

/ˈpɪθləs/
adjective
  1. Lacking strength, substance, or meaning; weak or insipid.
    • The speech was pithless and full of empty promises.
    • She found the novel pithless, with no real plot or character development.
    • His pithless argument failed to convince anyone in the debate.
Antonyms
What does "pithless" mean? | whatsthatwordmean | whatsthatwordmean