To force someone or something to leave; to eject or discharge forcibly. Often used in educational contexts for removing students or in medical contexts for bodily functions.
From Latin 'expellere' meaning 'to drive out' (ex- 'out' + pellere 'to drive, push'). The root 'pellere' also gives us 'propel', 'repel', and 'compel'. The word has maintained its forceful connotation throughout its history.
Try Another Word