Where does “unexpugnable” come from?

unexpugnable (English) comes from English expugnable, from Latin expugnabilis, from Latin expugno, from Latin pugnō, from Latin pūgnus, from Proto-Italic pugnos, from Proto-Indo-European puǵnos, from Proto-Indo-European pewǵ- — to punch, fist-fight; to prick, poke, stab.

unexpugnable (English): That cannot be expugned; safe from attack

Definitions

  1. That cannot be expugned; safe from attack

Ancestry of “unexpugnable”, step by step

unexpugnable traces back through two separate lines of ancestry.

via English expugnable

StepLanguageWordMeaning
1EnglishexpugnableCapable of being taken by storm
2Latinexpugnabilisable to be taken by storm, expugnable
3LatinexpugnoI capture, take by storm, conquer; I storm,...
4Latinpugnōto fight, combat, battle, engage
5Latinpūgnusa fist; a hand with all fingers curled up
6Proto-Italicpugnosfist
7Proto-Indo-Europeanpuǵnos
8Proto-Indo-Europeanpewǵ-to punch, fist-fight; to prick, poke, stab

via English un

StepLanguageWordMeaning
1EnglishunOne
Every word from Proto-Indo-European pewǵ-Every word from Proto-Indo-European puǵnosEvery word from Proto-Italic pugnos