vo·li·tion
noun/vəˈlɪʃn/
/vəʊˈlɪʃn/
[uncountable] (formal)- the power to choose something freely or to make your own decisions
意志力；自愿选择；自行决断 - They left entirely of their own volition (= because they wanted to).
他们完全是自愿离开的。
Word Originearly 17th cent. (denoting a decision or choice made after deliberation): from French, or from medieval Latin volitio(n-), from volo ‘I wish’. - They left entirely of their own volition (= because they wanted to).