'carouse' originates from German, specifically the word 'gar aus,' where 'gar' meant 'completely' and 'aus' meant 'out.'

'gar aus' transformed into the French word 'carous,' and eventually became the modern English word 'carouse' through Middle English.

Initially, it meant 'to drink completely,' but over time it evolved into its current meaning of 'to drink and celebrate noisily.'