Impalpable :: Impalpable (a.) Not palpable; that cannot be felt; extremely fine, so that no grit can be perceived by touch..
Impalpable :: Impalpable (a.) Not material; intangible; incorporeal.
Impalpable :: Impalpable (a.) Not apprehensible, or readily apprehensible, by the mind; unreal; as, impalpable distinctions..