'prosperidad' originates from Latin, specifically the word 'prosperitas', where 'prosper-' meant 'favorable, fortunate'.

'prosperidad' changed from the Late Latin/Vulgar Latin word 'prosperitas' into Old Spanish forms (via Medieval Latin influences) and eventually became the modern Spanish word 'prosperidad'.

Initially, it meant 'good fortune or favorable condition', but over time it evolved into its current meaning of 'a condition of wealth, success, or general well-being'.