Ears

According to the Old English Dictionary:

ærs, es;

EARS

m. The breech, the buttocks, the hind part; ánus, pōdex. [Piers P. ers: Chauc. ers, erse: Plat. aars, ars, eers, m: Frs. earse, earz: O. Frs. ers: Dut. aars, m: Ger. arsch, m: M. H. Ger. O. H. Ger. ars, m. cūlus, pōdex: Dan. ars, arts, m. f; Swed. ars, m: Icel. ars, rass, m.] DER. open-ærs: ears-ende, -gang, -ling, -lýre, -ode, -þerl. ears