The Spanish word 'tere' is simply a shortened or colloquial form of 'tereré', which refers to a cold mate drink. This type of shortening is common in casual Spanish speech, where longer words are abbreviated for convenience.

The full form 'tereré' is the main related Spanish word, which specifically refers to a cold-brewed yerba mate beverage that is particularly popular in Paraguay and parts of Argentina and Brazil. While 'tere' is the casual shortened version, 'tereré' is the standard term.

There are no direct English cognates for 'tere' or 'tereré', as this word comes from South American origins specific to mate drinking culture.