'arriba' originates from Spanish, specifically the phrase 'a riba', where 'a-' meant 'to/on' and 'riba' derived from Latin 'ripa' meaning 'bank' or 'shore'.

'arriba' changed from the Old Spanish phrase 'a ripa' and eventually became the modern Spanish word 'arriba' used to mean 'up' or 'on high'.

Initially, it meant 'on the bank/shore', but over time it evolved into its current meanings of 'up' and as an exclamatory 'come on' or 'hurrah'.