Etymon
en-inactive-protogermanic-in-protoindoeuropean-h2-protoindoeuropean-eh2-protoindoeuropean-yeti-protoindoeuropean-eh2yeti-protoindoeuropean-h2ti-protogermanic-ona-protogermanic-inona-protoindoeuropean-dye-protogermanic-atjana-protoindoeuropean-tus-protogermanic-uz-protogermanic-assuz-protogermanic-inassuz-protowest-germanic-nassi-old-english-nes-middle-english-nesse-english-ness-english-inactiveness-from-inactive-ness
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.