Dollar

The dollar is the world's most common currency, used in the US, Australia, Canada, Fiji, New Zealand, and Singapore and elsewhere.

According to OxfordWords, the Flemish or Low German word "joachimsthal" referred to Joachim's Valley, where silver was once mined. Coins minted from this mine became "joachimsthaler," which was later shortened to "thaler" and which eventually morphed into "dollar."