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Definition of impregnable

impregnable

/ɪmˈprɛɡnəbəl/
im · preg · na · ble
Adverb:impregnably
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impregnable Lexical Profile

impregnable Game Scores & Validity

• adjective

1

So strongly built, fortified, or positioned as to be unable to be captured, broken into, or breached by force.

Example

"Perched high atop sheer granite cliffs, the medieval citadel remained impregnable for centuries."

2

Unable to be defeated, overcome, or undermined by criticism, challenge, or competition.

Example

"By the final quarter of the fiscal year, the tech company had established a seemingly impregnable lead in the market."

Synonyms
View all synonyms for impregnable
Antonyms
View all antonyms for impregnable

Word Nuance & Usage

Despite looking similar, 'impregnable' is etymologically unrelated to 'pregnant' or 'impregnate'; it derives from an Old French root meaning 'to take' or 'seize', not from Latin 'praegnas' (with child).

• Rhymes for impregnable

• Nearby Words

imprecisely
imprecision
impregnability
impregnable
impregnably
impregnatable
impregnate

Word Origin & Etymology

Borrowed in the late Middle English period from Old French 'imprenable', formed from 'im-' (not) and 'prenable' (able to be taken), from the verb 'prendre' (to take), ultimately from Latin 'prehendere' (to seize or grasp).

Cite this Entry

Wordmom. (2026). Definition of Impregnable. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/impregnable
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