'dissolute' originates from Latin, specifically the word 'dissolutus,' where 'dis-' meant 'apart' and 'solvere' meant 'to loosen.'

'dissolutus' transformed into the Old French word 'dissolu,' and eventually became the modern English word 'dissolute' through Middle English.

Initially, it meant 'loosened or free from restraint,' but over time it evolved into its current meaning of 'lacking moral restraint.'