Confine means to keep within bounds, to keep in a limited space or area.
Confine implies that someone has the power to keep a person in a certain space. This can be most easily described through a prison.
Examples:
The judge said, "I confine this person to jail for 30 days.” (The judge has the power)
那个法官说，"我宣布把这个人关进监狱30天"
I feel like I am confined in the house due to the rain these days. (The nature has the power)
这些天一直下雨，我觉得我像是被禁足在家里。
Confine 限制、紧闭。尤指限制行动自由的空间边界，引申为学科或活动领域的范围限制。
Constrain means to force physically by strong persuasion, to compel, to oblige. It is used more in the sense of space limits, restrictions, or controls.
Examples:
Government laws must not constrain innovation of people.
政府法律不应妨碍人们的创新。
The police hope to take actions to constrain violence.
那个警察希望能采取点措施去控制暴力犯罪。
Constrain 控制、压制的意思。
Restrain means to hold back or stop someone or something from doing something, to prevent somebody from doing something.
Restrain 克制。Restrain oneself 自制，克制自己，约束自己
Examples:
I wanted to eat more, but for the health purpose, I restrained myself.
我想多吃点，但考虑到健康，我克制了我自己。
Restrict means to make a rule, law, or regulation usually set by people in charge. RESTRICT is often stronger than LIMIT and there will be a fine or punishment for violating a restriction.
Examples:
The city restricts the use of Drones (无人机)
这个城市严格限制无人机的活动。
The school restricts the use of smart phones in school.
这个学校禁止在校园内使用智能手机。
Restrict 约束、限定。Restrict violation 违反限制
Limit is to describe the point of the end of possibility. Compare with RESTRICT, LIMIT is more like a guideline than a rule, which only tell the amount of something you can have/take.
Limit 标准，可量化的限制的尺度的意思。
Examples:
My mother set a limit on how many hours I can watch TV every day.
我妈妈规定了我每天可以看电视的时间。
Everyone should follow the speed limit during driving. (If the speed limit is 120 miles per hour, it’s better that your driving speed does not go faster than 120)
任何人开车时都应该遵守交通规则制定的速度限制。
