Where does “earnest” come from?

Earnest comes from Old English eornest, derived from Proto-Germanic *arnustiz, ultimately tracing to Proto-Indo-European roots meaning serious intent or vigorous striving.

earnest (English): Gravity; serious purpose; earnestness;...

Definitions

  1. Gravity; serious purpose; earnestness;...

Ancestry of “earnest”, step by step

earnest traces back through two separate lines of ancestry.

via English earn

StepLanguageWordMeaning
1EnglishearnTo gain through applied effort or work; To...
2Middle EnglishernenTo earn to accrue or receive payments
3Old EnglishirnanAlternative form of rinnan; to run
4Old Englishrinnanto run
5Proto-West Germanic*rinnanto run, to flow
6Proto-Germanicrinnanąto run, to rush; to flow
7Proto-Indo-Europeanh₃ér-to move, to stir

via Middle English ernest

StepLanguageWordMeaning
1Middle Englishernest
2Old Englisheornest
3Proto-Germanicernustuzseriousness; earnest; strength; solidity;...
4Proto-Germanicarnizefficient, capable, diligent, sure
5Proto-Indo-Europeaner-eagle, bird; loose, light, rare, sparse; to fail,...

Words derived from “earnest

Every word from Proto-Indo-European h₃ér-
earnest — Etymology, Origin & Word History | Etymology Explorer