Where does “wherethrough” come from?

wherethrough (English) comes from English where, from Middle English wher, from Old English hwǣr, from Old English -a, from Proto-Germanic -ō, from Proto-Germanic -ô, from Proto-Indo-European -ō — Derives nouns from roots.

wherethrough (English): Through which; By means of which; whereby

Definitions

  1. Through which; By means of which; whereby

Ancestry of “wherethrough”, step by step

wherethrough traces back through two separate lines of ancestry.

via English where

StepLanguageWordMeaning
1EnglishwhereWhile on the contrary; although; whereas; At or...
2Middle Englishwherwhere
3Old Englishhwǣrwhere
4Old English-aEnding forming adverbs; nominative masculine...
5Proto-GermanicCreates feminine nouns from roots and stems
6Proto-Germanic-ly; Forms agent nouns, often from the zero-grade...
7Proto-Indo-EuropeanDerives nouns from roots

via English through

StepLanguageWordMeaning
1EnglishthroughFrom one side of an opening to the other;...
2Middle Englishthrugh
3Old EnglishþurhAPI; through; by means of: by, through, via
4Proto-Germanicþurhwthrough
5Proto-Indo-Europeantr̥h₂kʷe
6Proto-Indo-Europeanterh₂-to cross over, pass through, overcome
Every word from Proto-Indo-European Every word from Proto-Germanic Every word from Old English -a