Where does “feintli” come from?

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

Ancestry of “feintli”, step by step

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

Words derived from “feintli”

Every word from Middle English fainten →Every word from English faint →
feintli — Etymology, Origin & Word History | Etymology Explorer