See Table at currency.
[From earlier Caribbean French, piece of eight, short for piastre gourde, partial translation (influenced by gourde, feminine of gourd, numb, stiff) of Spanish peso gordo : peso, piece of eight + gordo, thick, fat (from Latin gurdus, dolt, dullard (said by Quintilian to be a word originating in Spain)); perhaps ultimately akin to Greek bradus and Lithuanian gradus, slow (either via inheritance from Proto-Italic or borrowing from an unknown Indo-European language of pre-Roman Spain).]
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Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.