Etymon
itc-kaido-latin-caedo-protoindoeuropean-h2-protoindoeuropean-eh2-protoitalic-a-latin-a-latin-cida-protoindoeuropean-yos-protoitalic-ios-old-latin-ios-latin-ius-latin-ium-latin-cidiumder
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.