Where does “faintful” come from?

faintful (English) comes from English faint, from Middle English fainten.

faintful (English): Displaying weakness, frailty, or faintness;...

Definitions

  1. Displaying weakness, frailty, or faintness;...

Ancestry of “faintful”, step by step

faintful traces back through two separate lines of ancestry.

via English faint

StepLanguageWordMeaning
1EnglishfaintLacking strength; weak; languid; inclined to lose...
2Middle Englishfainten

via English ful

StepLanguageWordMeaning
1Englishful
Every word from Middle English fainten
faintful — Etymology, Origin & Word History | Etymology Explorer