Lewis & Short

vīlesco, lŭi, 3 v. inch. n. [vilis], to become worthless, bad, vile (late Lat.): quamvis clarus homo vilescit in turbā, Hier. Ep. 66, 7; Sid. Ep. 7, 9; Paul. Nol. Carm. 22, 56; Aug. Tract. in Joan. 24, 1.