Etymon
gem-leusana-protogermanic-lausaz-protogermanic-lausaz-protogermanic-skamolausaz-protowest-germanic-skamulaus-old-english-scamleas-middle-english-shameles-english-shameless-protoindoeuropean-leyg-protogermanic-likader
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.