The verb means properly to besmear or besmirch, and is never used in a good sense, as μιαίνειν (Joh 18:28; Jud 1:8), which in classical Greek is sometimes applied to staining with color. See on 1Pe 1:4.
Virgins (παρθένοι)
Either celibate or living in chastity whether in married or single life. See 1Co 7:1-7, 1Co 7:29; 2Co 11:2.