Synonyms|713Antonyms|152|Broader|9Narrower|8Related|663
0
elastic
0
elemental
0
elementary
0
essential
0
evident
0
explanatory
0
explicate
0
extricable
0
facile
0
flexible
0
free
0
fundamental
0
giving
0
glaring
0
graspable
0
harsh
0
helpless
0
holey
0
illuminating
0
imaginable
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APASmart Define. (2015). impenetrable thesaurus. Retrieved September 25, 2026, from https://smartdefine.org/impenetrable/thesaurus/antonyms
ChicagoSmart Define. 2015. "impenetrable thesaurus" https://smartdefine.org/impenetrable/thesaurus/antonyms (accessed September 25, 2026).
HarvardSmart Define 2015, impenetrable thesaurus, Smart Define, viewed 25 September, 2026, <https://smartdefine.org/impenetrable/thesaurus/antonyms>.
MLASmart Define. "impenetrable thesaurus" 10 April 2015. Web. 25 September 2026. <https://smartdefine.org/impenetrable/thesaurus/antonyms>