volunteer
n. countablen. someone who offers to do a job or help others without being paid. You can also use this word for a plant that grows on its own without being planted.
n. a person who freely offers to take part in an enterprise or undertake a task without financial compensation. In botanical contexts, it refers to a plant that grows spontaneously from self-sown seed rather than being intentionally cultivated.
She works as a volunteer at the local animal shelter.
The charity is looking for a volunteer to help manage their social media accounts during the summer.
While the garden was carefully planned, several volunteer tomato plants emerged from the compost, eventually outperforming the varieties that the landscapers had specifically selected for the season.
Borrowed from Middle French voluntaire, from Latin voluntārius (“willing, voluntary”); or from voluntary + -eer.
Commonly followed by the preposition 'for' when describing the task or 'at' when describing the location.
She is a volunteer of the hospitalShe is a volunteer at the hospitalEnglish speakers typically use 'at' or 'for' to link a volunteer to an organization, rather than 'of'.