Uncertain, but probably from Arabic. There are several comparable roots, two or more of which may also have been merged.
- Based on the meanings “chin, snout” compare: 1.) Arabic قَيْدُوم (qaydūm, “bow of a ship”), قُدّام (quddām, “front part”), from which latter Maltese quddiem; 2.) Berber (Tarifit) udem (“face”).
- Based on the meaning “lower jaw” compare: 1.) Maltese gidem (“to bite”), from Arabic كَدَمَ (kadama); 2.) Arabic قَدُّوم (qaddūm, “adze”); 3.) Arabic جُذُوم (juḏūm), plural of جِذْم (jiḏm, “root, foundation, lower part”, and in one old source “gum, place where a tooth grows”).
geddum m (plural gdiedem)