'mentor' originates from Greek, specifically the word 'Mentor,' a character in Homer's Odyssey, where 'Mentor' was a trusted friend and advisor to Odysseus.

'Mentor' was adopted into Latin as 'Mentor' and eventually became the modern English word 'mentor' through Middle English.

Initially, it referred to a specific character in Greek mythology, but over time it evolved into its current meaning of 'advisor or guide.'