Where does “clarifieth” come from?

clarifieth (English) comes from English clarify, from Middle English clarifien.

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

Definitions

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

Ancestry of “clarifieth”, step by step

clarifieth traces back through two separate lines of ancestry.

via English clarify

StepLanguageWordMeaning
1EnglishclarifyTo make clear or bright by freeing from feculent...
2Middle Englishclarifien

via English eth

StepLanguageWordMeaning
1EnglishethA letter introduced into Old English to...
Every word from Middle English clarifienEvery word from English clarify