Etymon
frm-practique-protoindoeuropean-nos-protoitalic-nos-latin-nus-latin-anus-latin-ianus-old-french-ien-middle-french-ien-middle-french-practicienbor
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.