'defecate' originates from Latin, specifically the word 'defaecare,' where 'de-' meant 'away' and 'faex' meant 'dregs.'

'defaecare' transformed into the French word 'déféquer,' and eventually became the modern English word 'defecate' through Middle English.

Initially, it meant 'to purify or cleanse,' but over time it evolved into its current meaning of 'to discharge feces from the body.'