Where does “interest” come from?

Interest comes from Old French interesse, derived from French intérêt, from Latin interesse meaning "to be between or matter," composed of inter "between" and sum "to be," with sum tracing to Proto-Indo-European h₁ésmi "to be."

interest (English): The price paid for obtaining, or price received...

Definitions

  1. The price paid for obtaining, or price received...

Ancestry of “interest”, step by step

interest traces back through two separate lines of ancestry.

via Old French interest

StepLanguageWordMeaning
1Old Frenchinterest
2Frenchintérêtinterest; point
3Medieval Latininteressepresent active infinitive of intersum; to...
4Latininteressepresent active infinitive of intersum; to...
5Latinessepresent infinitive of sum; state, condition;...
6Ancient Greekοὐσίαthat which is one's own, one's substance,...
7Ancient GreekεἰμίTo be, exist; live; To be; it is possible
8Proto-Hellenicehmito be
9Proto-Indo-Europeanh₁ésmifirst-person singular present indicative of...
10Proto-Indo-Europeanh₁ēs-to be

via Old French interesse

StepLanguageWordMeaning
1Old Frenchinteresse

Words derived from “interest

Every word from Proto-Indo-European h₁ēs-