退学, たいがく
Takes suru
1. dropping out of school, withdrawing from school
2. expulsion from school, dismissal
3. leaving school (university, etc.) after completing a course
彼は十七歳で高校を退学した。
する, 為る
Conjugated: しなかった
Usually in kana
1. to do, to carry out, to perform
2. to cause to become, to make (into), to turn (into)
3. to serve as, to act as, to work as
4. to wear (clothes, a facial expression, etc.)
as 〜にする,〜とする
5. to judge as being, to view as being, to think of as, to treat as, to use as