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
adverb -ˈspyü-nə-
Synonyms
- certain
- determinate
- final
- firm
- fixed
- flat
- frozen
- hard
- hard-and-fast
- set
- settled
- stable
See all Synonyms & Antonyms 
Example Sentences
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
inexpugnable
adjective
as in unchangeable
having been established and usually not subject to change an inexpugnable belief in the essential goodness of people Synonyms & Similar Words
Relevance
- unchangeable
- stable
- unchanging
- fixed
- certain
- determinate
- final
- frozen
- firm
- settled
- hard
- flat
- set
- steady
- constant
- unwavering
- hard-and-fast
- uniform
- reliable
- good
- explicit
- dependable
- definite
- solid
- true
- specific
- safe
- given
- exact
- nonadjustable
- trustworthy
- noncancelable
- nonnegotiable
- responsible
- stated
- stipulated
- trusty
- sure
- tried
- tried-and-true
Antonyms & Near Antonyms
- changeable
- adjustable
- negotiable
- indefinite
- uncertain
- unpredictable
- changeful
- unspecified
- unstable
- variable
- volatile
- capricious
- inconstant
- mutable
- unsettled
- fluctuating
- mercurial
- fluid
- unsteady
- temperamental
- open-ended
- flickery
- intermontane
- intermorainic
- intermountain
- intermundane
- intermundia
- intermundial
- intermundian
- intermundium
- intermural
- intermurally
- intermutual
- intermutually
- intermède
- intermèdes
- intern
- internal
- internal angle
- internal audit
- internal ballistics
- internal black spot
- internal bleeding
- internal brown fleck
- internal brown spot
- internal check
- internal clock