'deep-fry' originates from the combination of 'deep' and 'fry', where 'deep' refers to the depth of oil used and 'fry' means to cook in hot fat or oil.

'deep-fry' evolved from the Old English word 'frīgan', which meant 'to fry', combined with 'deep' to specify the cooking method.

Initially, it meant 'to cook in hot fat or oil', and this meaning has largely remained the same in modern usage.