She resolved to work as a volunteer.

She devoted herself to the volunteer activity.

He devoted himself to the volunteer activity.

I have a friend who works as a volunteer.

Have you ever done any volunteer work?

Since I have no children, I have more time to spend doing volunteer work than parents do.

"What's the purpose of your staying?" "It is to participate in the voluntarism held by Giban village (That takes place here)"

Are you volunteering?