Etymon
pie-h1egh-protoindoeuropean-s-protoindoeuropean-h1eghs-protoindoeuropean-teros-protoindoeuropean-h1eghsteros-protoitalic-eksteros-latin-exter-latin-extra-english-extra-from-latin-extra
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.