'immodest' originates from Latin, specifically the word 'immodestus,' where 'im-' meant 'not' and 'modestus' meant 'moderate or restrained.'

'immodestus' transformed into the Old French word 'immodeste,' and eventually became the modern English word 'immodest' through Middle English.

Initially, it meant 'not moderate or restrained,' and this meaning has largely remained the same in modern usage.