ETYM Pref. in- not + conceivable: cf. French inconcevable.
Not conceivable; incapable of being conceived by the mind; not explicable by the human intellect.
ETYM Pref. in- not + tangible: cf. French intangible.
1. Lacking substance or reality; incapable of being touched or seen; SYN. nonphysical.
2. Incapable of being perceived by the senses especially the sense of touch; SYN. impalpable.
3. Hard to pin down or identify.
4. (Of especially business assets) Not having physical substance or intrinsic productive value.
To an inconceivable degree.
Impalpably, in an intangible manner, without substance; in a manner which is difficult to grasp mentally