impenetrable
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About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.im·pen·e·tra·ble
adjective \(ˌ)im-ˈpe-nə-trə-bəl\Definition of IMPENETRABLE
1
a : incapable of being penetrated or pierced b : inaccessible to knowledge, reason, or sympathy : impervious
See Examples of IMPENETRABLE
- The fort's defenses were thought to be impenetrable.
- <the ancient temple was surrounded by vast stretches of impenetrable jungle>
Origin of IMPENETRABLE
Middle English impenetrabel, from Middle French impenetrable, from Latin impenetrabilis, from in- + penetrabilis penetrable
First Known Use: 15th century
Related to IMPENETRABLE
- Synonyms
- impassable (also impassible), impermeable, impervious, impregnable
- Antonyms
- negotiable, passable, penetrable, permeable
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