Etymon
gem-arijaz-protowest-germanic-ari-old-english-ere-middle-english-ere-english-er-english-producer-protoindoeuropean-h1egh-protoindoeuropean-s-protoindoeuropean-h1eghs-protoitalic-eks-latin-ex-latin-ex-protoindoeuropean-deh3redup
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.