volunteer
//ˌvɒlənˈtɪər//
Noun
A person who freely offers to do something or work without being paid or forced to do so.
Many volunteers helped clean up the park after the festival.
A person who performs military service willingly, rather than being conscripted.
He joined the army as a volunteer rather than waiting to be drafted.
Synonym
Verb
To freely offer to do something or give one's services without being asked or paid.
She volunteered to help organize the school event.
To offer information or a statement without being asked.
She volunteered the information before anyone could ask.
To enlist for military service of one's own free will.
He volunteered for the army when he was eighteen.
Synonym
Adjective
Done, given, or acting of one's own free will without payment or compulsion.
She does volunteer work at the local hospital every weekend.