Where does “sayeth” come from?

Sayeth comes from English say, which derives from Anglo-Norman assaier meaning to try or test, ultimately from Proto-Indo-European h₂eǵ- meaning to drive or act.

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

Definitions

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

Ancestry of “sayeth”, step by step

StepLanguageWordMeaning
1EnglishsayTo pronounce; To recite; To tell, either verbally...
2EnglishassayTrial, attempt; Examination and determination;...
3Middle EnglishassayExamining; investigation, looking into, research;...
4Anglo-NormanassaierAlternative form of essaier
5Old Frenchessaitrial
6Late Latinexagiumweight; weighing, testing on the balance;...
7Latinexigōto drive out; expel
8Latinagōto act, to behave
9Proto-Italicagōdrive; push, impel; do, act
10Proto-Indo-Europeanh₂éǵetito be driving
11Proto-Indo-Europeanh₂eǵ-to drive
Every word from Proto-Indo-European h₂eǵ-