inexpugnable

adjective

in·​ex·​pug·​na·​ble ˌi-nik-ˈspəg-nə-bəl 

-ˈspyü-nə-

1

: incapable of being subdued or overthrown : impregnable

an inexpugnable position

2

: stable, fixed

inexpugnable hatred

inexpugnableness noun

inexpugnably

ˌi-nik-ˈspəg-nə-blē 

-ˈspyü-nə-

adverb

Synonyms of inexpugnable

• stable
• unchangeable
• unchanging
• certain
• fixed
• final

Examples of inexpugnable in a Sentence

an inexpugnable belief in the essential goodness of people

Word History

Etymology

Middle English in-expungnabull, from Latin inexpugnabilis, from in- + expugnare to take by storm, from ex- + pugnare to fight — more at pungent

First Known Use

15th century, in the meaning defined at sense 1