Where does the word "dollar" originate?

"Dolor," latin for "sad."

NB, this probably isn't true.

Wikipedia:
The name is related to the historic currencies Tolar in Bohemia (and, today, in Slovenia), Thaler or Taler in Germany, Daalder in the Netherlands and Daler in Sweden, Denmark and Norway. The name thaler (from Thal, or nowadays usually Tal, "valley") originally came from the German Guldengroschen ("great gulden", being of silver but equal in value to a gold gulden) coins minted from the silver from a rich mine at Joachimsthal (St. Joachim's Valley) in Bohemia (then part of the Habsburg Empire). The name Spanish dollar was used for a Spanish silver coin, the peso, an eight-real coin, which was widely circulated during the 18th century in the Spanish colonies in the New World. The use of the Spanish dollar and the Maria Theresa thaler as legal tender for the early United States is the reason for the name of the nation's currency. The word dollar was in use in the English language for the thaler for about 200 years before the American Revolution. Spanish dollars, or "pieces of eight" as they were called, were in circulation in the 13 colonies that became the United States, and were legal tender in Virginia.

ha, I just went and Wikipedia'd it too. What'd we do before the Internet again?

Before the internet we were just as misinformed, but everything was spelled correctly.

Oh and "collar":
[Middle English coler, from Old French colier, from Latin collāre, from collum, neck.]

I think you really need to give the Czechs credit for this one

do you see what i did there

Oh dear.