Etymology tree Proto-Indo-European *h₂éd Proto-Italic *ad Proto-Italic *ad- Latin ad-bor. English ad- Late Latin rēn Proto-Indo-European *h₂el-der.? Proto-Italic *-ālis Late Latin -ālis Late Latin rēnālislbor. English renal English adrenal Proto-Indo-European *-nós Proto-Indo-European *-iHnos Proto-Italic *-īnos Latin -īnusder. Old French -inbor. Middle English -in English -ine English…