impregnable

1
[ im-preg-nuh-buhl ]
/ ɪmˈprɛg nə bəl /

adjective

strong enough to resist or withstand attack; not to be taken by force, unconquerable: an impregnable fort.
not to be overcome or overthrown: an impregnable argument.

Origin of impregnable

1
1400–50; late Middle English impregnable, imprenable < Middle French, equivalent to im- im-2 + prenable pregnable
Related formsim·preg·na·bil·i·ty, im·preg·na·ble·ness, nounim·preg·na·bly, adverb

Definition for impregnable (2 of 2)

impregnable

2
[ im-preg-nuh-buh l ]
/ ɪmˈprɛg nə bəl /

adjective

susceptible to impregnation, as an egg.

Origin of impregnable

2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for impregnable

British Dictionary definitions for impregnable (1 of 2)

impregnable

1
/ (ɪmˈprɛɡnəbəl) /

adjective

unable to be broken into or taken by forcean impregnable castle
unable to be shaken or overcomeimpregnable self-confidence
incapable of being refutedan impregnable argument
Derived Formsimpregnability or impregnableness, nounimpregnably, adverb

Word Origin for impregnable

C15 imprenable, from Old French, from im- (not) + prenable able to be taken, from prendre to take

British Dictionary definitions for impregnable (2 of 2)

impregnable

2

impregnatable (ˌɪmprɛɡˈneɪtəbəl)

/ (ɪmˈprɛɡnəbəl) /

adjective

able to be impregnated; fertile
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for impregnable

impregnable


adj.

early 15c., imprenable "impossible to capture," from Middle French imprenable "invulnerable," from assimilated form of in- "not, opposite of" (see in- (1)) + Old French prenable "assailable, vulnerable" (see pregnable). With intrusive -g- 16c., on model of deign, reign, etc. Related: Impregnability.

Online Etymology Dictionary, © 2010 Douglas Harper