자퇴가 · 자퇴를
dropping out (voluntarily), withdrawal from school
Example
그는 건강 문제로 학교를 자퇴했어요.
He dropped out of school because of health problems.
Word parts
자 self+퇴 withdraw
Literally 'leaving by oneself'.
Good to know
자퇴 is your own choice; 퇴학 means being expelled.