'accouplement' originates from Middle French, specifically the word 'accouplement', where 'ac-' meant 'to' and 'coupler' meant 'to couple or join.'

'accouplement' changed from the Middle French word 'accouplement' and eventually became the modern English word 'accouplement'.

Initially, it meant 'to join or couple together', and this meaning has largely remained the same in modern usage.