‘Zìwèi’ literally combines ‘zì’ (self) and ‘wèi’ (to comfort, console), so its core meaning is ‘self-comfort’. In classical or literary contexts, it can refer to comforting oneself emotionally—such as after disappointment or loss. However, in modern spoken and written Chinese, the term is overwhelmingly used as a clinical, formal, or euphemistic term for masturbation.

This shift reflects how medical and psychological terminology has influenced everyday language. While technically neutral, ‘zìwèi’ carries a formal or clinical register; it is rarely used casually among friends and is more common in health education, medical consultations, or academic discussions about sexual health. It is not vulgar, but its formality means learners should avoid using it in informal conversation unless discussing health topics with appropriate tone and context.