The Spanish word 'guarapo', meaning 'sugarcane juice', comes from the Quechua word 'warapu', which meant 'sugarcane juice' or 'fruit juice'. This is one of many words that Spanish borrowed from indigenous American languages during the colonial period. The change from Quechua 'w' to Spanish 'gu' is a common adaptation pattern when Quechua words were borrowed into Spanish, since Spanish speakers often heard the Quechua 'w' sound as similar to their 'gu' sound.

Since 'guarapo' comes from Quechua rather than Latin or Greek roots, there aren't many other common Spanish words that are etymologically related to it. This is typical of words borrowed from indigenous American languages, which form their own distinct word families in Spanish.

There aren't any common English words directly related to 'guarapo', as it comes from Quechua. However, English has borrowed the word itself as 'guarapo', though it's primarily used in contexts discussing Latin American beverages and culture.