Old High German fīēn—printed fîên in the Althochdeutsches Wörterbuch—was a weak verb meaning to hate, not love, be hostile to, detest, or reject. The official dictionary says it is attested only in Alemannic manuscripts of the eighth and ninth centuries, then inventories an infinitive fien, present participle fiendi, second-person singular preterite fietos, and accusative plural masculine past participle fieta. Three rule-text records concern hating discipline, one’s own will, or no person; gloss records align the participial forms with Latin exosus or exosos; and an Esther gloss aligns fien with detestari. These are source-reported edition and dictionary records, not directly inspected manuscript objects, and the broad manuscript horizon does not identify one exact first token. A separate twelfth-century article printed fien [sic] with the gloss ubere is explicitly left uninterpreted by the dictionary and is not merged into this hate verb. Beside the verb, Old High German had the already lexicalized enemy noun fīant, whose old participial character could still shine through in fixed phrases. The graph therefore shows a living daughter verb beside a grammatical fossil without pretending that either attested form is the reconstructed Proto-Germanic word itself. No historical sound recording exists and the dossier does not display a fabricated phonetic certainty.