Shuar language in the context of Morona Santiago Province

Ecuador, officially the Republic of Ecuador, is a country in northwestern South America, bordered by Colombia on the north, Peru on the east and south, and the Pacific Ocean on the west. It also includes the Galápagos Province which contains the Galápagos Islands in the Pacific, about 1,000 kilometers (621 mi) west of the mainland. The country's capital is Quito and its largest city is Guayaquil.

The land that comprises modern-day Ecuador was once home to several groups of indigenous peoples that were gradually incorporated into the Inca Empire during the 15th century. The territory was colonized by the Spanish Empire during the 16th century, achieving independence in 1820 as part of Gran Colombia, from which it emerged as a sovereign state in 1830. The legacy of both empires is reflected in Ecuador's ethnically diverse population, with most of its 17.8 million people being mestizos, followed by large minorities of Europeans, Native American, African, and Asian descendants. Spanish is the official language spoken by a majority of the population, although 13 native languages are also recognized, including Quechua and Shuar.

Ilex guayusa (/ˈaɪlɛks ˈɡwaɪjuːsə/ or /ˈaɪlɛks ˈwaɪjuːsə/) is a species of tree in the holly family, Aquifoliaceae. It is native to the Amazon rainforest. One of four known caffeinated holly trees, the leaves of the guayusa tree are harvested fresh and brewed like a tea for their stimulative effects. It is known simply as guayusa in western languages like Spanish, as waisa in Kichwa and as wayus or wais in Shuar.