ununderstandable

Impossible to grasp

Ununderstandable means impossible or very difficult to understand.

The word is a somewhat awkward formation—incomprehensible serves the same purpose more elegantly—but it appears in casual speech and writing when speakers reach for an emphatic negative: His explanation was completely ununderstandable.

The double negative prefix (un-understand-able) gives it a clunky, emphatic quality.

confusing

incomprehensible

Impossible to understand

mystifying · puzzling · unfathomable · impenetrable · indecipherable · inscrutable · cryptic · enigmatic · unintelligible · inexplicable

technical

jargon

Specialized professional vocabulary

specifications · schematics · fine print · bureaucratese · acronyms · terminology · dense · impenetrable · specialized · esoteric

abstract

metaphysics

Philosophy of existence's nature

postmodernism · hermeneutics · deconstruction · dialectic · existentialism · transcendental · ontology · esoteric · abstruse · recondite

speech

mumbled

Spoke indistinctly

inarticulate · inaudible · accented · stuttered · gibberish · babble · murmured · unintelligible · unclear · indistinct

Opposites
comprehensibility

ununderstandableunderstandable

Able to be grasped

comprehensible · intelligible · clear · lucid · fathomable

Family

understand, understanding, understandable, misunderstanding, misunderstood

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