pension (n.)youdaoicibaDictYouDict[pension 词源字典]
mid-14c., "payment for services," especially "reward, payment out of a benefice" (early 14c., in Anglo-Latin), from Old French pension "payment, rent" (13c.) and directly from Latin pensionem (nominative pensio) "a payment, installment, rent," from past participle stem of pendere "pay, weigh" (see pendant). Meaning "regular payment in consideration of past service" first recorded 1520s. Meaning "boarding house, boarding school" first attested 1640s, from French, and usually in reference to places in France or elsewhere on the Continent.[pension etymology, pension origin, 英语词源]
exeatyoudaoicibaDictYouDict
"A permission from a college, boarding school, or other institution for temporary absence", Early 18th century: from Latin, 'let him or her go out', third person singular present subjunctive of exire (see exit).