Friedrich Kluge, An Etymological Dictionary of the German Language (1891)
“ Mord, masculine, ‘murder,’ from Middle High German mort (-des) , masculine and neuter, Old High German mord, neuter; compare Old Saxon morth, Dutch moord, Anglo-Saxon and Old Icelandic morð, ‘murder,’ with the common meaning ‘intentional, secret death-blow.’ Gothic *maurþ, neuter, is wanting; it is based on pre-Teutonic mṛto-m, neuter, and originally meant ‘death’ simply, as the root mor, ‘to die,’ widely diffused through all the Aryan languages, indicates. ”
