Expulsion

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late Middle English: from Latin expulsio(n- ), from expellere ‘drive out’ (see expel).

wiktionary

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From Middle English expulsioun, from Old French expulsion, from Latin expulsio, expulsionem.

etymonline

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expulsion (n.)

c. 1400, expulsioun, in medicine, "act of expelling matter from the body," from Old French expulsion or directly from Latin expulsionem (nominative expulsio), noun of action from past-participle stem of expellere "drive out" (see expel). From late 15c. as "forcible ejection, compulsory dismissal, banishment" as from a school or club.