elusive
imperceptible
subtle
unperceivable
airy
asomatous
astral
atomic
bodiless
branny
chalklike
chalky
comminute
comminuted
corpuscular
crushed
decarnate
decarnated
detrital
detrited
discarnate
disembodied
disintegrated
dusty
efflorescent
embryonic
ethereal
evanescent
extramundane
farinaceous
fine
flaky
floury
furfuraceous
germinal
ghostly
gone to dust
granular
grated
ground
immaterial
imponderable
inappreciable
incorporate
incorporeal
indiscernible
infinitesimal
insensible
insubstantial
intangible
invisible
dreamlike
ever-present
filmy
formless
illusory
inaudible
indefinable
misty
nebulous
powdery
translucent
undefinable
undefined
unreal
vaporous
vapory