= force
~ sb to do sth
The law can compel fathers to make regular payments for their children.
这项法律可强制父亲定期支付子女的费用。
I feel compelled to write and tell you how much I enjoyed your book.
我觉得必须写信告诉你我是多么欣赏你的书。
~ sth
Last year ill health compelled his retirement.
去年他因身体不好被迫退休了。