'triumphantly' originates from Latin, specifically the word 'triumphus,' where 'triumphus' meant 'a victory procession.'

'triumphus' transformed into the Old French word 'triumphe,' and eventually became the modern English word 'triumph' through Middle English.

Initially, it meant 'a victory procession,' but over time it evolved into its current meaning of 'showing great happiness or joy at a victory.'