Venial /(?)/

Ve·ni·al

Venial

a.
  1. Capable of being forgiven; not heinous; excusable; pardonable; as, a venial fault or transgression.
    So they do nothing, 't is a venial slip.
  2. Allowed; permitted. [Obs.]

Phrases & Compounds
Venial sin
a sin which weakens, but does not wholly destroy, sanctifying grace, as do mortal, or deadly, sins.