Where does “undertrodden” come from?

undertrodden (English) comes from English trodden, from English tread, from Middle English treden, from Middle English -en, from Old English -en, from Old Norse -inn, from Proto-Norse -īna-, from Proto-Germanic -īnaz — adjectival suffix.

Ancestry of “undertrodden”, step by step

undertrodden traces back through two separate lines of ancestry.

via English trodden

StepLanguageWordMeaning
1Englishtroddencrushed by being walked on; past participle of...
2EnglishtreadTo step or walk (on or across something); to trample
3Middle EnglishtredenTo place one's foot on something; to lay a step...
4Middle English-enDenotes the past participle form when attached to...
5Old English-enmæġþ + API → mæġden; cocc + API → cycen, cicen;...
6Old Norse-innUsed to create adjectives from nouns, meaning...
7Proto-Norse-īna-
8Proto-Germanic-īnaz-en
9Proto-Indo-European-iHnosCreates adjectives of materials
10Proto-Indo-European-no-adjectival suffix

via English under

StepLanguageWordMeaning
1EnglishunderIn or at a lower level than; As a subject of;...
2Middle Englishunderunder
3Old Englishunderunder, beneath
4Proto-Germanicunderamong, between; under, beneath; under
5Proto-Indo-Europeanh₁entérbetween
6Proto-Indo-Europeanh₁enin; in, inside
Every word from Proto-Indo-European -no-
undertrodden — Etymology, Origin & Word History | Etymology Explorer