The Spanish word 'requesón' (meaning 'cottage cheese') is formed from two Latin elements: the prefix 're-' meaning 'again' or 'back', and a derivative of the Latin word 'caseus' meaning 'cheese'. The word was constructed to describe a cheese product that undergoes a second processing - essentially a 're-cheesing' process, which results in the soft, crumbly texture characteristic of cottage cheese.

The most obvious related Spanish word is 'queso', meaning 'cheese', which comes directly from Latin 'caseus'. While 'queso' refers to cheese in general, 'requesón' specifically refers to cottage cheese, showing how the addition of the 're-' prefix helped create a term for this particular dairy product that requires additional processing.

While English 'cheese' is not directly related (it comes from a different Germanic root), we do see the Latin 'caseus' root in English words like 'casein' (the main protein found in milk) and 'caseous' (cheese-like or cheesy). These technical terms preserve the same ancient Latin root that gave Spanish both 'queso' and 'requesón'.