Word Forms of "impenetrable" (3 forms)

Adjective

Form	Word
Alternative	inpenetrable

Alternativeinpenetrable

Noun

Form	Word
Alternative	inpenetrable
Plural	impenetrables

Alternativeinpenetrable

Pluralimpenetrables

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.