'amaine' originates from Middle English, specifically the word 'amain,' where 'a-' meant 'in' and 'main' meant 'strength or force.'

'amain' changed from the Middle English word 'amain' and eventually became the modern English word 'amaine'.

Initially, it meant 'with great strength or force,' but over time it evolved into its current meaning of 'with great speed or force; suddenly or violently.'