Old Norse fjándi is a masculine noun whose inherited shape still exposes a prehistoric agent formation. Cleasby and Vigfússon compare Gothic fiands, Old English feond, German Feind, Swedish fiende, and Danish fjende, identify the nd as participial, and gloss the older formation as properly a hater. They then distinguish the ordinary enemy sense from a post-Christian fiend development. The University of Copenhagen Dictionary of Old Norse Prose supplies 222 citations and six semantic zones: enemy or opponent; devil, monster, or demon; evil spirit; pagan god; the Devil or Satan; and a derogatory term for a hated or bewitched person, animal, or object. Lexicon Poeticum independently exposes 49 poetic records, including source-reported tenth-century enemy uses and later Christian fiend uses, while warning that its concordance and dates require checking. The noun therefore does not possess one timeless true meaning: an inherited lexicalized hater became an ordinary enemy word, and the branch later accumulated several demonic and derogatory senses. The displayed pronunciation is an editorial normalized approximation, not recorded historical audio. No underlying manuscript object is claimed as directly inspected in this dossier.