free will

free-will的词性：
n.（名词）

1. The ability or discretion to choose; free choice:
自愿：选择的能力或自由；自由的选择：

chose to remain behind of my own free will.
我自愿呆在后面

2. The power, attributed especially to human beings, of making free choices that are unconstrained by external circumstances or by an agency such as fate or divine will.
自由意志：（尤指人类所有的）不被外界环境或力量（如命运或神灵意志）所强迫的进行自由选择的力量

free-will的词源：

3. Middle English fre wil
中古英语 fre wil

4. translation of Late Latin liberum arbitrium
后期拉丁语 liberum arbitrium的翻译

5. Latin liberum [free]
拉丁语 liberum [自由的]

6. Latin arbitrium [will]
拉丁语 arbitrium [意愿]