The Spanish word 'condimento' (meaning 'condiment, seasoning') comes from the Latin word 'condimentum', which also meant 'seasoning' or 'spice'. The Latin word was formed by combining two elements: the prefix 'con-' meaning 'together, with' and the suffix '-mentum' which was used to form nouns indicating an instrument, means, or result. So etymologically, a 'condimento' is something that goes 'together with' food as a means of flavoring it.

Some related Spanish words include 'condimentar' (to season or flavor food) and 'condimentación' (seasoning or flavoring process). These words share the same Latin root and maintain the core meaning related to adding flavor to food.

The English word 'condiment' is a direct cognate of the Spanish 'condimento', as both descended from the same Latin word 'condimentum'. This is why they look so similar and share the same meaning of a substance used to add flavor to food. The English language also has related words like 'condition' and 'condominium' that share the Latin prefix 'con-' (meaning 'with, together'), though these words developed different meanings over time.