volition
noun [ U ] formal uk/vəˈlɪʃ.ən/ us/vəˈlɪʃ.ən/
决断能力;意志力
the power to make your own decisions
The singer wished it to be known that he had left the band (out) of his own volition (= it was his decision). 这名歌手希望人们知道他是自己决定离开乐队的。