Etymon
en-spar-blend-english-fluorspar-protoindoeuropean-eh1ti-protoindoeuropean-sketi-protoindoeuropean-eh1sketi-protoitalic-esko-latin-esco-latin-escensder
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.