Dong
来自Big Physics
wiktionary
Borrowed from Vietnamese đồng, from Middle Chinese 銅(duwng, “copper”) (compare Mandarin 铜(tóng)), from Old Chinese 銅(*lˁoŋ).
Origin unknown. Perhaps from The Dong with a Luminous Nose, an 1894 poem by Edward Lear about a mythical creature. Attested since the 1930s.
Onomatopoeic
Korean 동(洞)(dong, “neighborhood”)
etymonline
dong (n.)
"penis," 1891, slang, of unknown origin. Perhaps suggested by dingus and other names for unnameable things; perhaps suggesting of a sound of striking (clapper of a bell?); perhaps there's an element of donkey in it.
dong (v.)
"to sound a large bell," 1580s, imitative. Related: Donged; donging.
