Etymon
pie-pos-protoindoeuropean-ti-protoindoeuropean-posti-protoitalic-posti-old-latin-poste-latin-post-english-post-protoindoeuropean-ke-protoindoeuropean-kom-protoitalic-kom-protoitalic-kom-latin-con-protoindoeuropean-upo-protoitalic-supo-latin-sub-latin-sub-protoindoeuropean-h1emder
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.