'enigma' originates from Greek, specifically the word 'ainigma,' where 'ainos' meant 'fable' or 'story.'

'ainigma' transformed into the Latin word 'aenigma,' and eventually became the modern English word 'enigma' through Old French.

Initially, it meant 'a fable or story with a hidden meaning,' but over time it evolved into its current meaning of 'a mysterious or puzzling thing.'