Where does “undertaketh” come from?

undertaketh (English) comes from English undertake, from Middle English undertaken, from Middle English taken, from Old English tācen, from Old Norse tekinn, from Proto-Germanic tēkanaz, from Proto-Germanic tēkaną, from Proto-Indo-European deh₁g- — to touch.

undertaketh (English): third-person singular simple present indicative...

Definitions

  1. third-person singular simple present indicative...

Ancestry of “undertaketh”, step by step

undertaketh traces back through two separate lines of ancestry.

via English undertake

StepLanguageWordMeaning
1EnglishundertakeTo take upon oneself; to start, to embark on; To...
2Middle EnglishundertakenTo pledge; to assert, assure; to dare say
3Middle Englishtakento take; Alternative form of token; Alternative...
4Old Englishtācen
5Old Norsetekinnpast participle of taka; take, took, taken
6Proto-Germanictēkanaz
7Proto-Germanictēkanąto touch; to grasp
8Proto-Indo-Europeandeh₁g-to touch

via English eth

StepLanguageWordMeaning
1EnglishethA letter introduced into Old English to...
Every word from Proto-Indo-European deh₁g-Every word from Proto-Germanic tēkanąEvery word from Proto-Germanic tēkanaz