Where does “unfailed” come from?

unfailed (English) comes from English un — One.

unfailed (English): Not failed

Definitions

  1. Not failed

Ancestry of “unfailed”, step by step

unfailed traces back through two separate lines of ancestry.

via English un

StepLanguageWordMeaning
1EnglishunOne

via English failed

StepLanguageWordMeaning
1Englishfailedsimple past tense and past participle of fail;...
Every word from English un