impurity Copy link Outline 1. impūrĭtas (rare)2. incestus, ūs and -um, i • impurity: 1. impūrĭtas (rare): to engage in every kind of i., omnes imp. suscipere, Cic. Ph. 2, 3, 6. 2. incestus, ūs and -um, i: v. UNCHASTENESS, incest.