Where does “unfoundered” come from?

unfoundered (English) comes from English un — One.

unfoundered (English): Not having foundered

Definitions

  1. Not having foundered

Ancestry of “unfoundered”, step by step

unfoundered traces back through two separate lines of ancestry.

via English un

StepLanguageWordMeaning
1EnglishunOne

via English foundered

StepLanguageWordMeaning
1Englishfounderedsimple past tense and past participle of founder
Every word from English un
unfoundered — Etymology, Origin & Word History | Etymology Explorer