The origin of the word Dollar:
"Jáchymov (Czech pronunciation: [ˈjaːxɪmof]; German: Sankt Joachimsthal or Joachimsthal) is a spa town in Karlovy Vary District in the Karlovy Vary Region of the Czech Republic. It has about 2,400 inhabitants."
Jáchymov ->
written in German as Joachimstal ->
(the "tal" part at the end means "valley" (just like Neandertal)) ->
When the silver mines opened in "Joachimstal" in 1516, they soon started minting coins called "Joachimstalers" ->
(here the "er" at the end refers to something being from somewhere, like a "Berliner" referring either to a person from Berlin, or in this special case a breakfast pastry from Berlin) ->
Joachimstaler, the name of the silver coin from Joachimstal, was shortened to "Taler" ->
And that was respelled to "Dollar."