Impalpable
Impalpable , adjective
[Prefix im- not + palpable: compare French impalpable.]
1.
Not palpable; that cannot be felt; extremely fine, so that no grit can be perceived by touch.
Impalpable powder.
2.
Not material; intangible; incorporeal.
Impalpable, void, and bodiless.
3.
Not apprehensible, or readily apprehensible, by the mind; unreal; as, impalpable distinctions.