mentor
This term carries a connotation of wisdom and long-term investment in another person's growth. It differs from a teacher or trainer by implying a more holistic, personal relationship that extends beyond specific technical skills to include professional ethics, networking, and life navigation.
In a professional setting, the word suggests a voluntary or semi-formal partnership based on trust and mutual respect. It evokes an image of a seasoned veteran guiding a novice through the unwritten rules of an industry or organization.
Meanings
An experienced and trusted adviser who guides a less experienced person in their professional or personal development.
She served as a mentor to several junior architects at the firm.
Examples
She acted as a mentor during my internship.