Etymon
gem-bano-protowest-germanic-bano-old-english-bana-middle-english-bane-english-bane-middle-english-berye-english-berry-english-baneberry-from-bane-berry
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.