insubstantial

/ˌɪnsəbˈstænʃəl/
adjective
  1. Not large, solid, or strong; weak or flimsy.
    • The tent was made of insubstantial fabric that tore easily in the wind.
    • They built an insubstantial shelter that collapsed after the first rain.
    • The evidence against him was insubstantial and the case was dismissed.
  2. Having no real substance or importance; not meaningful.
    • The movie had an insubstantial plot that left viewers bored.
    • Her argument was insubstantial and failed to convince anyone.
    • He made an insubstantial promise that he never intended to keep.
What does "insubstantial" mean? | whatsthatwordmean | whatsthatwordmean