'anchylosed' originates from Greek, specifically the word 'ankylos', where 'ankylos' meant 'crooked' or 'bent'.

'ankylos' changed from the Greek word 'ankylos' to the French word 'anchylose', and eventually became the modern English word 'anchylose', with 'anchylosed' as its past and adjectival form.

Initially, it meant 'crooked or bent', but over time it evolved into its current medical meaning of 'fused or stiffened joint'.