Siss Tsuwm-Bah! Still he remains closed tight as an oyster on the dadburned etymology. Maybe this is one of those teaching strategies to make us go word-spelunking ourselves.

Well, I'll just declare that monosterous and oyster are categorically derived from the same ancesterous word; gadflies and oysters have more in common than most people realize; and oysters are mammals. So there!

The Walrus, seeking a good carpenter to help open up these luctiferous oysters