inapprehensible

Cannot be grasped

Inapprehensible describes something that cannot be grasped by the mind or understood.

The word appears in philosophical and theological contexts for concepts beyond human comprehension: The nature of infinity remains inapprehensible to finite minds.

It can also mean impossible to physically seize or capture, though this use is rare.

incomprehensible

unfathomable

Beyond comprehension or measurement

unknowable · inexplicable · ungraspable · incomprehensible · indecipherable · inconceivable · unimaginable · fathomless · bottomless · profound

elusive

ungraspable

Impossible to seize

mercurial · protean · shifting · indefinable · amorphous · nebulous · vague · hazy · indistinct · blurred

abstract

metaphysical

Beyond the material realm

conceptual · theoretical · notional · immaterial · nonphysical · incorporeal · insubstantial · rarefied · abstruse · recondite

perceptual

imperceptible

Cannot be sensed

inaudible · intangible · impalpable · indiscernible · unobservable · subliminal · microscopic · infinitesimal · unperceivable

philosophical

epistemological

Relating to knowledge theory

Kantian · thing-in-itself · a priori · metaphysics · perception · cognition · consciousness · reality · existence · being

Opposites
cognitive accessibility

inapprehensibleapprehensible

Able to be understood

comprehensible · fathomable · understandable · graspable · knowable

clarity of perception

inapprehensibleclear

Without obstruction or fog

evident · manifest · obvious · apparent · perceptible

Family

comprehend, comprehensive, apprehend, apprehension, reprehensible, comprehensible, prehensile, reprehend, comprehensibility

Familiarity
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Used worldwide · Timeless · Abstract · Everyday, not technical · Rated G