participant

This term carries a neutral, clinical, or official tone, often appearing in the context of research, competitions, or organized workshops. It emphasizes the act of joining in rather than the role or status of the person. In a legal or scientific setting, it is the standard way to describe individuals without assigning them a specific label like subject or contestant. While a member belongs to a group permanently, a participant is often temporary, linked only to the duration of a specific event. The word implies a level of active engagement, whether that engagement is as simple as attending a meeting or as complex as contributing to a collaborative project.