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perfunctory (adj.)[perfunctory 词源字典]: 1580s, from Late Latin perfunctorius "careless, negligent," literally "like one who wishes to get through a thing," from Latin perfungus, past participle of perfungi "discharge, busy oneself, get through," from per- "through" + fungi "perform" (see function (n.)). Related: Perfunctorily.[perfunctory etymology, perfunctory origin, 英语词源]