tutor

/ˈtutər/

a person who gives private instruction (as in singing, acting, etc.)

中文释义：家庭教师；导师；辅导老师

She hired a math tutor to help her son prepare for the exam.

她请了一位数学家教帮助儿子备考。

The tutor provided personalized feedback on each student's essay.

导师对每位学生的论文提供了个性化反馈。