late 14c., "cast out," from Latin expellere "drive out, drive away," from ex "out" (see ex-) + pellere "to drive" (from PIE root *pel- (5) "to thrust, strike, drive"). Specific meaning "to eject from a school" is first recorded 1640s. Related: Expelled; expelling.
He was expelled from his native country
expediently
expedite
expedition
expeditionary
expeditious
expel
expellee
expend
expendable
expenditure
expense