re·tain·er
noun/rɪˈteɪnə(r)/
/rɪˈteɪnər/
- a sum of money that is paid to somebody to make sure they will be available to do work when they are needed
（聘请律师等的）预付费用，保留金 - The agency will pay you a monthly retainer.
这个机构将会每月付给你聘金。
- The agency will pay you a monthly retainer.
- (British English) a small amount of rent that you pay for a room, etc. when you are not there in order to keep it available for your use
（为保留租房而付的）租房定金 - Check whether full rent or a retainer is required during vacations.
检查假期期间是否需要全额租金或预付金。
- Check whether full rent or a retainer is required during vacations.
- (North American English) a device that keeps a person’s teeth straight after they have had orthodontic treatment with braces
（牙齿）固位体，保持器 - (old-fashioned) a servant, especially one who has been with a family for a long time
（尤指服务多年的）仆人，家仆