'Argentinean' originates from Latin and Spanish, specifically the Latin word 'argentum' and the Spanish adjective 'argentino', where 'argentum' meant 'silver'.

'Argentinean' changed from the Spanish word 'argentino' and the country name 'Argentina' (from Latin 'argentum') and eventually became the modern English forms 'Argentine' and 'Argentinean'.

Initially, it meant 'silvery' or 'of silver' (from 'argentum'), but over time it evolved into its current meaning 'of or from Argentina'.