Etymon
pie-pos-protoindoeuropean-ti-protoindoeuropean-posti-protoitalic-posti-old-latin-poste-latin-post-english-post-protoindoeuropean-h2ed-protoitalic-ad-protoitalic-ad-latin-ad-protoindoeuropean-kelder
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.