'jubilant' originates from Latin, specifically the word 'jubilare,' where 'jubil-' meant 'to shout for joy.'

'jubilare' transformed into the French word 'jubiler,' and eventually became the modern English word 'jubilant' through Middle English.

Initially, it meant 'to shout for joy,' but over time it evolved into its current meaning of 'feeling or expressing great happiness and triumph.'