evilesco

ē-vīlesco, lŭi, 3, v. inch. n., to become vile, worthless, despicable (post - Aug. and very rare):

nullis sordibus pretium carae pietatis evilescit,

Val. Max. 5, 4, 7:

pericula,

Tac. H. 3, 53:

propter quae usque eo eviluit, ut passim ac propalam contemptui esset,

Suet. Claud. 15.