The Spanish word 'barrigón' meaning 'big-bellied' comes from combining the Spanish word 'barriga' (meaning 'belly') with the augmentative suffix '-ón'. The word 'barriga' itself has interesting origins, deriving from the Celtic word 'barrica' which meant 'barrel' or 'container'. This etymology shows a clear semantic evolution - from a word meaning a large container or barrel, to describing a belly (which is like a container for food), and finally with the addition of '-ón' to specifically describe someone with a large belly.

A simpler and more common Spanish word that's related to 'barrigón' is 'barriga', meaning 'belly' or 'stomach'. While 'barriga' is the neutral term for belly, 'barrigón' specifically refers to having a large belly due to the augmentative suffix '-ón'. Spanish learners might also encounter this same suffix in other words like 'grandón' (very big) or 'casón' (mansion, from 'casa' meaning house).

While English doesn't have any direct cognates from the Celtic 'barrica', the word 'barrel' is distantly related, as it comes from the Old French 'baril' which shares the same Celtic root. This connection makes intuitive sense - both 'barrel' and 'barriga/barrigón' relate to rounded, container-like shapes, though one refers to an actual container and the other to a body part.