Dung

Webster's Practical Dictionary- A Practical Dictionary of the Englih Language · 1884 · p. 132

dung, re. The excrement of an animal. [DUNGED"(dungd), dunging.] To manure with Dungeon, dun'jun, n. A donjon, q. v., and see tle; a secure prison; esp. a dark, subterranean of confinement.