This is the 1999th most frequent Chinese word.
缺席
"缺席" means "absence" or "to be absent."
The word "缺席" is used here as a verb to denote not being present at the meeting.
他在会议上缺席了。
He was absent from the meeting.
In this sentence, "缺席" is used as a noun referring to the state of being absent.
缺席会影响你的考试成绩。
Being absent will affect your exam scores.
"缺席" is used as a verb to describe the action of not attending classes.