Where does “betrayeth” come from?

betrayeth (English) comes from English betray, from Middle English betrayen.

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

Definitions

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

Ancestry of “betrayeth”, step by step

betrayeth traces back through two separate lines of ancestry.

via English betray

StepLanguageWordMeaning
1EnglishbetrayTo deliver into the hands of an enemy by...
2Middle Englishbetrayen

via English eth

StepLanguageWordMeaning
1EnglishethA letter introduced into Old English to...
Every word from Middle English betrayenEvery word from English betray