Synonyms|713Antonyms|152|Broader|9Narrower|8Related|663

55 entries under adjective topic. ×

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perforated
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perspicacious
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piercing
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profound
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pure
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readable
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sagacious
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sensible
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shrewd
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sincere
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sparse
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strident
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subtle
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trenchant
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vivid
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APASmart Define. (2015). impenetrable thesaurus. Retrieved September 28, 2026, from https://smartdefine.org/impenetrable/thesaurus/antonyms
ChicagoSmart Define. 2015. "impenetrable thesaurus" https://smartdefine.org/impenetrable/thesaurus/antonyms (accessed September 28, 2026).
HarvardSmart Define 2015, impenetrable thesaurus, Smart Define, viewed 28 September, 2026, <https://smartdefine.org/impenetrable/thesaurus/antonyms>.
MLASmart Define. "impenetrable thesaurus" 10 April 2015. Web. 28 September 2026. <https://smartdefine.org/impenetrable/thesaurus/antonyms>