An Etymological Dictionary of the German Language/Harn

by Friedrich Kluge

Harn, m., ‘urine,’ earlier dial. variant Harm (Luther), from MidHG. harn (Bav. and East Rhen.), harm, m. and n., OHG. haran, m., ‘urine’ (respecting the variant with m see Farn); a specifically UpG. word, probably identical orig. with AS. scearn, OIc. skarn, n., ‘mud’; sk and h (the latter for k without s) would have interchanged in OTeut. Allied to Gr. σκώρ; comp. hocken, drosseln, links, Stier. The derivation of Harn from a root har, ‘to pour out,’ remains dubious.