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 (ĭn′ĭk-spŭg′nə-bəl, -spyo͞o′nə-)
1. Impossible to overcome or overthrow by force.
2. Impossible to put aside or drive away: inexpugnable dislike.

[Middle English, from Old French, from Latin inexpugnābilis : in-, not; see in-1 + expugnābilis, capable of being overcome (from expugnāre : ex-, completely; see ex- + pugnāre, to fight; see impugn).]

in′ex·pug·na·bil′i·ty n.
in′ex·pug′na·bly adv.
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.


a rare word for impregnable1
ˌinexˌpugnaˈbility, ˌinexˈpugnableness n
ˌinexˈpugnably adv
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌɪn ɪkˈspʌg nə bəl)

Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.inexpugnable - 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.