inappreciable (adj.)
- atomic
- corpuscular
- dinky
- dispensable
- embryonic
- evanescent
- germinal
- granular
- immaterial
- impalpable
- imperceptible
- imponderable
- inadequate
- inconsequential
- inconsiderable
- indiscernible
- inessential
- inferior
- infinitesimal
- insensible
- insignificant
- insufficient
- intangible
- invisible
- irrelevant
- little
- microcosmic
- microscopic
- minor
- minute
- molecular
- negligible
- nonessential
- scanty
- scrimpy
- skimpy
- small
- subatomic
- technical
- tenuous
- thin
- ultramicroscopic
- unapparent
- unessential
- unimpressive
- unobservable
- unperceivable
- unseeable
