Etymon
pie-nos-protoindoeuropean-ihnos-protogermanic-inaz-protoindoeuropean-kos-protogermanic-gaz-protogermanic-ingaz-protogermanic-panningaz-protowest-germanic-panning-old-english-penig-middle-english-peny-english-penny-english-catchpenny-from-catch-penny
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.