'mustard' originates from Old French, specifically the word 'moustarde,' where 'moust' meant 'must' (fermented grape juice) and 'ard' was a suffix indicating a characteristic.

'moustarde' transformed into the Middle English word 'mustard,' and eventually became the modern English word 'mustard'.

Initially, it referred to a condiment made with must and ground seeds, but over time it evolved into its current meaning of a spicy condiment made from mustard seeds.