'milkshake' originates from English, specifically the combination of 'milk' and 'shake', where 'milk' refers to the dairy product and 'shake' refers to the act of mixing or blending.

'milkshake' was first used in the late 19th century to describe a drink made with milk and flavorings, and eventually became the modern English word 'milkshake'.

Initially, it meant a drink made with milk and flavorings, and this meaning has largely remained the same in modern usage.