'barato' originates from Spanish (also used in Portuguese), specifically the word 'barato', where the root is ultimately traced to Vulgar Latin '*barattus' related to trade or barter.

'barato' developed from Vulgar Latin '*barattus' into Old Spanish/Medieval Iberian forms and eventually became the modern Spanish and Portuguese word 'barato'.

Initially associated with bargaining or trade (idea of exchange/low value), it evolved to mean 'inexpensive' or 'of little monetary value' in modern usage.