Etymon
en-disto-protoindoeuropean-me-protoindoeuropean-dheh1-protoindoeuropean-dhe-protoindoeuropean-medhi-protoindoeuropean-os-protoindoeuropean-medhyos-protoitalic-mejos-latin-medius-protoindoeuropean-h2elder
A dedicated page for this root is on the way — it will gather every word descended from it, sibling forms across daughter languages, and a branching map of the family tree.