Etymon
enm-ficcioun-english-fiction-protoindoeuropean-genh1-protoindoeuropean-yos-protogermanic-kunja-protowest-germanic-kuni-old-english-cynna-middle-english-kin-english-kin-english-fictionkin-from-fiction-kin
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.