volunteer
US /ˌvɑlənˈtɪr/
・UK /ˌvɒlən'tɪə(r)/
B2
adjecitve
- Working willingly without pay to help others
noun
- Person who helps others without being paid
verb
- To work willingly without pay to help others
Examples
The office is staffed by unpaid volunteers.
The charity is appealing for volunteers to take elderly patients to and from hospital.