Was heißt »Freiwilliger« auf Englisch?

Das Substantiv Freiwilliger lässt sich wie folgt von Deutsch auf Englisch übersetzen:

Deutsch/Englische Beispielübersetzungen

Tom meldete sich als Freiwilliger für die Mission.: Tom volunteered for the mission.
Es bietet sich niemand als Freiwilliger an.: No one wants to volunteer.
Er hat sich als Freiwilliger gemeldet.: He put himself forward as a volunteer.; He enlisted as a volunteer.

I answered her questions, but I did not volunteer any information.
I am a volunteer.
I used to volunteer at the food pantry around the corner.
We need one more volunteer to go on a mission to rescue Tom.
Would you be willing to volunteer at the animal shelter two or three days a week?
Perhaps you'd be willing to volunteer to take care of the children.
Perhaps you'd be willing to volunteer.
I've already found a volunteer.
He's a volunteer fireman.
Six men came forward to volunteer for the work.
No one wanted to volunteer.
We need a volunteer.
I need a volunteer.
I'd like to volunteer my services.
I'm a volunteer.
Tom began working as a volunteer at the homeless shelter while he was still in high school.
Tom certainly isn't going to volunteer.
Tom was the first one to volunteer to help.
I've decided to join the volunteer fire department.
Since I have no children, I have more time to spend doing volunteer work than parents do.