'promiscuity' originates from Latin, specifically the word 'promiscuus,' where 'pro-' meant 'forward' and 'miscere' meant 'to mix.'

'promiscuus' transformed into the French word 'promiscuité,' and eventually became the modern English word 'promiscuity' through Middle English.

Initially, it meant 'mixed or mingled together,' but over time it evolved into its current meaning of 'engaging in casual sexual relationships.'