expiate

v. (-ting) pay the penalty for or make amends for (wrongdoing).  expiable adj. Expiation n. Expiatory adj. [latin expio: related to *pious]

v. t. To extinguish the guilt of by sufferance of penalty or some equivalent; to make complete satisfaction for; to atone for; to make amends for; to make expiation for; as, to expiate a crime, a guilt, or sin.