iron.dat
īsern
N (neut, a-stem)the metal iron; an instrument or tool made from iron, especially an iron sword; an iron shackle or fetter
Attested in Exeter Book Riddle 5 (īserne)
originates from: PGmc *īsarna- "iron" (īsarna- > īsarn > īsærn > īsearn) through pgmc-to-oeParadigms(source: Kroonen 2013:271)