Bravo and Grande are two rivers in South America. The Ríos is the Spanish word for rivers, so the answer to the crossword clue is 'Ríos'. The Bravo and Grande are two of the largest rivers in South America, with the Bravo being the longest. They both originate in the Andes Mountains and flow into the Atlantic Ocean. The Bravo River is also known as the Río de la Plata, which means 'River of Silver' in Spanish. The Grande River is also known as the Paraná River. Both rivers are important sources of water for the countries they pass through, including Argentina, Brazil, Paraguay, and Uruguay.