adjective/mileˈnaɾjo/
thousand-year-old; millennial; millenary
Etymology tree Latin mīlle Proto-Indo-European *-nósder. Latin -ēnus Latin mīllēnus Proto-Indo-European *-yósder. Proto-Italic *-āzios Latin -ārius Latin mīllēnāriuslbor. Spanish milenario Learned borrowing from Latin mīllēnārius.