Etymology tree Proto-Indo-European *yéwHs Latin iūs Old French jusbor. Middle English jus English juice Proto-Indo-European *-yósder. Proto-Italic *-āzijos Latin -āriusnom. Latin -āriusbor. Proto-Germanic *-ārijaz Proto-West Germanic *-ārī Old English -ere Middle English -ere English -er English juicer From juice + -er.