Dyngan

According to the Old English Dictionary:

dyngan

p. ede; pp. ed [dung dung] To DUNG, manure; stercŏrāre. [Piers P. dongen: Wyc. dunge: Frs. dongjen: O. Frs. donga, denga: Ger. düngen: M. H. Ger. tungen: Dan. dynge to heap up.] DER. ge-dyngan. dyngan