Etymon
en-defect-protoindoeuropean-ter-protoindoeuropean-dhlom-protoindoeuropean-dhlis-protoitalic-lis-latin-bilis-latin-ibilis-old-french-ibleder
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.