'Argentinian' originates from Spanish, specifically the word 'Argentina', where the element 'argent-' comes from Latin 'argentum' meaning 'silver'.

'Argentinian' developed in English from references to 'Argentina' (the country name), influenced by Spanish forms such as 'argentino/argentina' and English variant 'Argentine', eventually occurring as the adjective and noun 'Argentinian'.

Initially associated with 'silver' (from Latin 'argentum') and the region named for the Río de la Plata ('silver river'), it evolved to mean 'from or relating to the country of Argentina' and 'a person from Argentina'.