Etymon
gem-arijaz-protowest-germanic-ari-old-english-ere-middle-english-ere-english-er-english-spoiler-protoindoeuropean-h2eg-protoindoeuropean-os-protoindoeuropean-h2eksder
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.