Etymon
pie-ke-protoindoeuropean-kom-protoitalic-kom-protoitalic-kom-latin-con-latin-loquor-latin-colloquor-protoindoeuropean-yos-protoitalic-ios-old-latin-ios-latin-ius-latin-ium-latin-colloquiumder
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.