|in+ adjective
Etymology: Middle French, from Latin inexpugnabilis, from in- in- (I) + expugnabilis expugnable — more at expugnable
1. : incapable of being taken by assault or subdued by force : impregnable
his position though strong was not inexpugnable — G.B.Sansom
2. : incapable of being overthrown or driven out
most common and inexpugnable error of criticism — Meyer Schapiro
: stable , fixed
inexpugnable hatred
• in·ex·pugna·ble·ness -nə̇s noun -es
• in·ex·pugna·bly -blē, -bli adverb