Synonyms|101Antonyms|52|Broader|0Narrower|0Related|43
4
imperviously(adverb, invulnerably)
3
incomprehensibly(adverb, unintelligibly)
3
opaquely(adverb, opaquely)
3
unfathomably
2
darkly(adverb, opaquely)
2
impermeably
2
indestructibly(adverb, invulnerably)
2
inscrutably
2
invincibly(adverb, invulnerably)
2
invulnerably(adverb, invulnerably)
2
obscurely(adverb, opaquely)
1
abstrusely
1
arduously
1
cloudily(adverb, opaquely)
1
compactly
1
densely
1
dumbly
1
enigmatically
1
expectantly
1
fathomlessly
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APASmart Define. (2013). impenetrably thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/impenetrably/thesaurus/synonyms
ChicagoSmart Define. 2013. "impenetrably thesaurus" https://smartdefine.org/impenetrably/thesaurus/synonyms (accessed September 20, 2026).
HarvardSmart Define 2013, impenetrably thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/impenetrably/thesaurus/synonyms>.
MLASmart Define. "impenetrably thesaurus" 17 June 2013. Web. 20 September 2026. <https://smartdefine.org/impenetrably/thesaurus/synonyms>