'raucous' originates from Latin, specifically the word 'raucus', where 'raucus' meant 'hoarse or harsh'.

'raucus' transformed into the French word 'rauc', and eventually became the modern English word 'raucous' through Middle English.

Initially, it meant 'hoarse or harsh', but over time it evolved into its current meaning of 'disturbingly harsh and loud noise'.