'arachide' originates from French, ultimately from Latin 'arachis' and Greek 'arákhis', where 'arákhis' meant 'peanut' or 'groundnut'.

'arachide' changed from the Greek word 'arákhis' to Latin 'arachis' and later entered French as 'arachide', from which the modern French word comes.

Initially it referred to the same plant/seed ('peanut' or 'groundnut') in Greek, and over time the meaning has largely remained the same in modern usage.