Synonyms|43Antonyms|26|Broader|0Narrower|0Related|29
4
impenetrably(adverb, invulnerably)
2
firmly
2
hermetically
2
impassably
2
impermeably
2
invulnerably(adverb, invulnerably)
2
proofly
2
tightly
2
waterproofly
1
callously
1
forcefully
1
formidably(adverb, invulnerably)
1
heartily
1
hermeticly
1
inaccessibly
1
indestructibly(adverb, invulnerably)
1
insensitively
1
intensely
1
invincibly(adverb, invulnerably)
1
loudly
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APASmart Define. (2015). imperviously thesaurus. Retrieved September 21, 2026, from https://smartdefine.org/imperviously/thesaurus/synonyms
ChicagoSmart Define. 2015. "imperviously thesaurus" https://smartdefine.org/imperviously/thesaurus/synonyms (accessed September 21, 2026).
HarvardSmart Define 2015, imperviously thesaurus, Smart Define, viewed 21 September, 2026, <https://smartdefine.org/imperviously/thesaurus/synonyms>.
MLASmart Define. "imperviously thesaurus" 14 April 2015. Web. 21 September 2026. <https://smartdefine.org/imperviously/thesaurus/synonyms>