impregnable

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im·preg·na·ble 1

 (ĭm-prĕg′nə-bəl)
adj.
1. Impossible to capture or enter by force: an impregnable fortress.
2. Difficult or impossible to attack, challenge, or refute with success: an impregnable argument.

[Middle English imprenable, from Old French : in-, not (from Latin in-; see in-1) + prenable, pregnauble, pregnable; see pregnable.]

im·preg′na·bly adv.

im·preg·na·ble 2

 (ĭm-prĕg′nə-bəl)
adj.
Capable of being impregnated.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

impregnable

(ɪmˈprɛɡnəbəl)
adj
1. unable to be broken into or taken by force: an impregnable castle.
2. unable to be shaken or overcome: impregnable self-confidence.
3. incapable of being refuted: an impregnable argument.
[C15 imprenable, from Old French, from im- (not) + prenable able to be taken, from prendre to take]
imˌpregnaˈbility, imˈpregnableness n
imˈpregnably adv

impregnable

(ɪmˈprɛɡnəbəl) or

impregnatable

adj
able to be impregnated; fertile
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

im•preg•na•ble

(ɪmˈprɛg nə bəl)

adj.
1. strong enough to resist or withstand attack; unconquerable: an impregnable fort.
2. irrefutable; unassailable.
[1400–50; late Middle English impregnable, imprenable < Middle French, =im- im-2 + prenable pregnable]
im•preg`na•bil′i•ty, im•preg′na•ble•ness, n.
im•preg′na•bly, adv.
syn: See invincible.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

impregnable

- Means "incapable of being taken by force" (from French prendre, "seize").
See also related terms for incapable.
Farlex Trivia Dictionary. © 2012 Farlex, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.impregnable - immune to attack; incapable of being tampered with; "an impregnable fortress"; "fortifications that made the frontier inviolable"; "a secure telephone connection"
invulnerable - immune to attack; impregnable; "gunners raked the beach from invulnerable positions on the cliffs"
2.impregnable - capable of conceiving
fertile - capable of reproducing
3.impregnable - incapable of being overcome, challenged or refuted; "an impregnable argument"; "impregnable self-confidence"
unconquerable - not capable of being conquered or vanquished or overcome; "a tribute to his courage...and his unconquerable will"- R.E.Danielson; "faced unconquerable difficulties"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.

impregnable

Collins Thesaurus of the English Language – Complete and Unabridged 2nd Edition. 2002 © HarperCollins Publishers 1995, 2002

impregnable

adjective
Incapable of being conquered, overrun, or subjugated:
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Translations

impregnable

[ɪmˈpregnəbl] ADJ [castle] → inexpugnable (lit, fig) [position] → invulnerable
Collins Spanish Dictionary - Complete and Unabridged 8th Edition 2005 © William Collins Sons & Co. Ltd. 1971, 1988 © HarperCollins Publishers 1992, 1993, 1996, 1997, 2000, 2003, 2005

impregnable

[ɪmˈprɛgnəbəl] adj
[fortress] → imprenable
(fig) [position, person] → inattaquable
impregnable to attack → inattaquable
Collins English/French Electronic Resource. © HarperCollins Publishers 2005

impregnable

adj (Mil) fortress, defencesuneinnehmbar; (fig) positionunerschütterlich; argumentunwiderlegbar, unumstößlich
Collins German Dictionary – Complete and Unabridged 7th Edition 2005. © William Collins Sons & Co. Ltd. 1980 © HarperCollins Publishers 1991, 1997, 1999, 2004, 2005, 2007

impregnable

[ɪmˈprɛgnəbl] adj (fortress, defences) → inespugnabile (fig) (person, group) → inattaccabile
Collins Italian Dictionary 1st Edition © HarperCollins Publishers 1995