Etymologists aren't exactly sure of the origins of the verb dicker; however, there is a probability that it arose from the bartering of animal hides on the American frontier. The basis of that theory is founded on the noun dicker, which in English can refer to a quantity of ten hides. That word is derived from decuria, the Latin word for a bundle of ten hides, and ultimately from Latin decem, meaning "ten" (to learn why the month December comes from the Latin word decem, click here). In ancient Rome, a decuria became a unit of bartering. The word entered Middle English as dyker and eventually evolved to dicker. It has been posited that the verb emerged from the bargaining between traders over dickers of hides, but not all etymologists are sold on that idea.