Etymon
ll-forma-late-latin-formo-late-latin-informo-protoindoeuropean-tis-protoindoeuropean-ho-protoindoeuropean-tiho-protoitalic-tio-late-latin-tio-late-latin-informatioder
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.