An Etymological Dictionary of the German Language/Annotated/irden

by Friedrich Kluge

irden, adjective, ‘earthen,’ from Middle High German and Old High German irdîn, adjective, ‘made of clay’ (also ‘earthly’); an adjective of material allied to Old High German ërda, ‘earth.’ Also irdisch, with a different application from the equivalent Middle High German irdesch, Old High German irdisc (properly ‘peculiar or belonging to the earth’; with regard to the suffix compare deutsch and Mensch). See Erde.