perfunctory (adj.)

"done mechanically or without interest or zeal and merely for the sake of being rid of the duty of doing it; done so as to conform to the letter but not the spirit," 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" (from PIE root *per- (1) "forward," hence "through") + fungi "perform" (see function (n.)). Related: Perfunctorily.