Plural of guaraní; either the Guarani people of South America, or the currency of Paraguay.
From the Guarani language and people of Paraguay and Brazil. The currency guaraní was adopted in 1944 to honor the indigenous Guarani nation.
The Guarani people gave the world not just their currency name, but also guaraná berries, and their language influenced Portuguese and Spanish so deeply that words like 'jaguar' and 'peanut' come from Guarani!
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