mid 18th century: via French and Latin from the Greek Mentōr, the name of the adviser of the young Telemachus in Homer's Odyssey

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noun: mentor; plural noun: mentor

 

1. An experienced and trusted adviser.​ adviser, guide, confidant, confidante, counsellor, consultant, therapist; master,  spirtual leader, guru, swami, maharishi, acharya

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2. An experienced person in a company or educational institution who trains and counsels new employees or students

trainer, teacher, tutor, coach, instructor

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verb: mentor; 3rd person present: mentors; past tense: mentored; past participle: mentored; gerund or present participle: mentoring​:

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3. advise or train (someone, especially a younger colleague).

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