(a.) Unsubstantial; not real or strong.

adulterated airy asomatous astral attenuate attenuated bodiless boyish brittle capricious changeable chimerical corruptible cut dangerous decarnate decarnated deciduous decrepit defalcation deficiency deficit delicate desultory diaphanous dilute diluted discarnate disembodied dying ephemeral ethereal evanescent extramundane fading FALSE fancied fanciful fantastic feeble fickle fine fine-drawn finespun fleeting flimsy flitting fly-by-night flying fragile frail fugacious fugitive gaseous gauzy ghostly girlish gossamer gracile hallucinatory illusive illusory imaginary imagined immaterial impalpable impermanent impetuous imponderable impulsive inadequacy inconclusive inconstant incorporate incorporeal infirm insecure insignificant insufficiency intangible lack lacy light metaphysical misty momentary mortal mutable nondurable nonmaterial nonpermanent nonphysical nonsubstantial occult otherworldly paltry papery passing paucity perilous perishable phantasmal phantom poor poverty precarious provisional psychic puny rare rarefied risky scant scantiness scarceness shadowy shaky shifting shifty short-lived shortage slender slenderish slight slight-made slim slimmish slinky slippery small spiritual subtile subtle supernatural svelte sylphlike temporal temporary tentative tenuous thin thin-bodied thin-set thin-spun thinned thinned-out thinnish threadlike ticklish transient transitive transitory transmundane treacherous uncompact uncompressed unconcrete undependable underage undurable unearthly unembodied unenduring unextended unfaithworthy unfleshly unphysical unproved unreal unreliable unrigorous unsolid unsound unstable unsteadfast unsteady unsubstanced unsubstantial unsure unsustained untrustworthy unworldly vague vaporous visionary volatile wasp-waisted watered watered-down watery weak weightless willowy windy wiredrawn wispy