1、able to act at will; not hampered; not under compulsion or restraint.
能夠任意動作；不受阻礙；不在強迫或者抑制之下。

2、A promise made under compulsion is of no force.
在強迫下作出的承諾是沒有約束力的。

3、The law clearly says any action under compulsion or in a state of intoxication has no effect.
他說，“法律明確說明在強制或神智不清的情況下做出的任何行為都是無效的。

under compulsion翻譯