G2433 ἱλάσκομαι (hiláskomai)

KJV renderings: be merciful, make reconciliation for
Strong's definition: to conciliate, i.e. (transitively) to atone for (sin), or (intransitively) be propitious
Derivation: middle voice from the same as G2436 (ἵλεως);

From James Strong's public-domain dictionaries (G), JSON edition by OpenScriptures (CC-BY-SA). Every dotted-underline word in the text links here.