An Etymological Dictionary of the German Language/irden

by Friedrich Kluge

irden, adj., ‘earthen,’ from MidHG. and OHG. irdîn, adj., ‘made of clay’ (also ‘earthly’); an adj. of material allied to OHG. ërda, ‘earth.’ Also irdisch, with a different application from the equiv. MidHG. irdesch, OHG. irdisc (prop. ‘peculiar or belonging to the earth’; with regard to the suffix comp. deutsch and Mensch). See Erde.