'barbarical' originates from Late Latin, specifically the word 'barbaricalis', where 'barbar-' came from Greek 'barbaros' meaning 'foreign, barbarous'.

'barbarical' changed from Late Latin 'barbaricalis' (and Latin 'barbaricus') via Middle English (and Anglo-French influence) and eventually became the modern English word 'barbarical'.

Initially, it referred to things 'of or relating to foreigners' or 'foreign-sounding'; over time it evolved to mean 'uncivilized' or 'savage', similar to the modern sense of 'barbaric'.