will A1

/wɪl/ a fixed and persistent intent or purpose

volunteer B1

/ˌvɑlənˈtɪɹ/ tell voluntarily

voluntary C1

/ˈvɑ.lənˌt(ɛ)ɹi/ controlled by individual volition

benevolent B2

/bəˈnɛvələnt/ generous in assistance to the poor

benevolence B2

/bəˈnɛvələns/ Disposition to do good.