The Spanish word 'jarro' (meaning 'jug') comes from the Arabic word 'jarrah' (جرة), which meant 'jar'. The word entered Spanish as 'jarra' and then developed the masculine form 'jarro', with a slight differentiation in meaning. While both refer to containers for liquids, 'jarro' typically describes a pitcher or jug, often with a handle and spout.

A closely related and very common Spanish word is 'jarra', which means 'jar' or 'pitcher'. While 'jarro' typically refers to a smaller jug or pitcher, 'jarra' often denotes a larger container or vessel. You might also encounter the phrase 'en jarras' (with hands on hips), which comes from the shape resembling handles on a jar.

The English word 'jar' is actually related to 'jarro', as both ultimately trace back to Arabic 'jarrah'. This connection makes it easy to remember the meaning of 'jarro', since both the English 'jar' and Spanish 'jarro' refer to containers for holding liquids or other substances, though 'jarro' specifically means a jug or pitcher.