Voluntary
/ˈvɑː.lənˌter.i/
(done by choice)
Done by choice or free will, without being forced or required.
Example sentences :
She joined the team as a voluntary member to help with the event.
Donating to the charity was completely voluntary.
The company encourages voluntary participation in community projects.
His help with the move was entirely voluntary.
Volunteers do voluntary work to support local causes.
Common usage tip(s) :
"Voluntary" is often used to describe actions done willingly or by choice.
It is commonly paired with words like "service," "work," or "effort."