'acouchi' originates from French, specifically the word 'acouchi', which was derived from the indigenous Tupi language, where 'aku'si' referred to a type of rodent.

'acouchi' was borrowed from the French word 'acouchi', which was derived from the Tupi language, and eventually became the modern English word 'acouchi'.

Initially, it referred to a specific type of rodent in the Tupi language, and this meaning has largely remained the same in modern usage.