'philanderer' originates from Greek, specifically the word 'philandros,' where 'phil-' meant 'loving' and 'andros' meant 'man.'

'philandros' transformed into the French word 'philandre,' and eventually became the modern English word 'philanderer' through Middle English.

Initially, it meant 'a loving man,' but over time it evolved into its current meaning of 'a man who engages in love affairs frivolously or casually.'