Dictionary.com
Thesaurus.com
Synonyms

inexpugnable

American  
[in-ik-spuhg-nuh-buhl] / ˌɪn ɪkˈspʌg nə bəl /

adjective

  1. incapable of being taken by force; impregnable; unconquerable.

inexpugnable British  
/ ˌɪnɪkˈspʌɡnəbəl /

adjective

  1. a rare word for impregnable 1

"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

Other Word Forms

Etymology

Origin of inexpugnable

1375–1425; late Middle English < Latin inexpugnābilis, equivalent to in- in- 3 + expugnābilis ( expugnā ( re ) to take by storm ( ex- ex- 1 + pugnāre to fight) + -bilis -ble )

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.