- insubstantial
- adj1. unsubstantial, slight, flims" tenuous, thin, watery, watered-down; poor, weak, feeble, frail, fragile; delicate, dainty, light, fine, ethereal, gauzy, gossamer, cobwebby.2. insignificant, unimportant, of little or no import, negligible, nugatory, inconsiderable, inconsequential; trivial, trifling, petty, niggling, minor, piddling, Inf. picayune; paltry, meager, mere, scant, small, puny, dinky.3. unreal, illusory, illusive, false, delusive, hallucinatory, phantom, phantasmal, spectral, ghostly; intangible, impalpable, immaterial, incorporeal, spiritual; visionary, imaginary, imagined, chimerical, dreamy, fanciful; airy, vaporous, wild, idle, empty; fantastic, make-believe, made-up, fictitious.
A Note on the Style of the synonym finder. 2014.