Etymon
pie-is-protoindoeuropean-h1oynos-protogermanic-ainaz-protogermanic-libana-protogermanic-lif-protogermanic-ainalif-protowest-germanic-ainalif-protowest-germanic-ainalifun-old-english-endleofan-middle-english-elleven-english-eleven-pregreekder
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.