(每日一词）expulsion

expulsion /ɪkˈspʌl.ʃən/ n. 驱逐，赶走；开除

meaning: (the act of) forcing someone, or being forced to leave a school, organization, or country

1) 前缀：ex-向外

2) 词根：puls- 推，拉

3) 后缀：-ion 名词后缀

e.g.  They threatened him with expulsion from school. 他们威胁要把他开除出学校。