'occidentale' originates from Latin via Italian/French, specifically the Medieval/Latin adjective 'occidentalis', where 'occidens' (present participle of 'occidere') meant 'setting' or 'west (the direction of the setting sun)'.

'occidentale' changed from the Latin/Medieval Latin word 'occidentalis' and via Old French/Italian forms (French 'occidental/occidentale', Italian 'occidentale') eventually became the modern Italian/French word 'occidentale'.

Initially it was related to 'the setting (of the sun)' or 'west'; over time it came to mean 'of or relating to the West' or simply 'western'.