Etymon
gem-anda-protowest-germanic-anda-old-english-and-old-english-on-middle-english-on-english-un-protoindoeuropean-ke-protoindoeuropean-kom-protoitalic-kom-protoitalic-kom-latin-con-protoindoeuropean-gel-latin-gelu-protoindoeuropean-h2-protoindoeuropean-eh2-protoindoeuropean-yeti-protoindoeuropean-eh2yeti-protoitalic-ao-latin-o-latin-gelo-latin-congeloder
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.