1
[ adjective ] not admitting of penetration or passage into or through

Examples

"an impenetrable fortress" "impenetrable rain forests"

Related terms

penetrable dense

2
[ adjective ] permitting little if any light to pass through because of denseness of matter

Synonyms

dense heavy

Examples

"dense smoke" "heavy fog" "impenetrable gloom"

Related terms

thick

3
[ adjective ] impossible to understand

Examples

"impenetrable jargon"

Related terms

incomprehensible

*

Rhymes with

demonstrable trouble uninhabitable inevitable inhospitable habitable palatable irritable charitable inimitable indomitable inequitable equitable unpalatable disreputable profitable marketable reputable creditable heritable inheritable attributable comparable rubble supportable intractable redoubtable countable exportable unfathomable accountable applicable irrevocable desirable unserviceable revocable deductible affordable insupportable serviceable unenforceable transportable adaptable inviolable formidable impressionable enforceable undesirable unfashionable adorable unaccountable unprofitable practicable tractable retractable objectionable questionable veritable adjustable unmentionable portable compatible fathomable unsupportable forcible unconscionable reportable navigable discoverable actionable adoptable abominable reasonable excitable noticeable insurmountable unquestionable estimable seasonable remarkable determinable inalienable communicable inexhaustible incalculable incompatible equitable imaginable interminable unremarkable personable deplorable horrible fissionable fashionable incorrigible knowledgeable intelligible eligible negligible unintelligible terrible arable eatable admirable tribal comfortable uncomfortable intertribal lovable parable potable bearable wearable notable gullible suitable durable pitiable agreeable inhospitable injectable debatable predictable curable lamentable irresistible convertible contestable inscrutable undetectable preventable deliverable delectable preferable disagreeable respectable digestible unbeatable contemptible unbearable inflatable detectable repairable rentable regrettable unalterable miserable incurable rechargeable unacceptable unpredictable presentable immutable acceptable comparable favorable quotable trumbull collectible transmittable execrable unsuitable indisputable perceptible forgettable vegetable uninsurable repeatable printable chargeable nondurable hospitable susceptible irrefutable constable suggestible unforgettable unprintable stubble untouchable variable crumble grumble laudable viable liable unflappable credible culpable audible rumble incredible understandable describable mandible unreadable biodegradable indescribable improbable

Phonetic and Homophones

IH0 M P EH1 N AH0 T R AH0 B AH0 L

Similar Spelling

impenetrability impenitent impendence impenitently

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