Middle voice from the same as hileos; to conciliate, i.e. (transitively) to atone for (sin), or (intransitively) be propitious -- be merciful, make reconciliation for.
see GREEK hileos
ἱλάσθητί (ilasthēti) − 1 Occurrence
ἱλάσκεσθαι (ilaskesthai) − 1 Occurrence