ἱλάσκομαι (< ἵλαος = ἵλεως) [in LXX (cf. Westc., Epp. Jo., 85 f.) for סָלַח, Refs 4Ki.5:18 24:4, Psa.25:11, La 3:42, Da TH Dan.9:19; כָּפַר pi., Refs Psa.65:3 78:38 79:9; נָחַם ni., Refs Exo.32:14, Est.4:17 * ;] __1. in cl., with accusative of person(s), to conciliate, appease, propitiate (= ἐξιλάσκομαι, Refs Gen.32:20, Pro.16:14, Mal.1:9, al.). __2. In LXX (Thackeray, Gr., 270, 1.), Inscr. (Deiss., BS, 224 f.), and NT, to be propitious, merciful (with dative of thing(s), Psa.79:9, al.): with dative of person(s) (Refs 4Ki.5:18), Luk.18:13. __3. As in Philo (= ἐξιλάσκ-, in LXX: Eze.43:22, al.), to expiate, make propitiation for: τ. ἁμαρτίας, Heb.2:17 (Cremer, 301 ff., 735).† (AS)
Thayer:
1) to render one's self, to appease, conciliate to one's self 1a) to become propitious, be placated or appeased 1b) to be propitious, be gracious, be merciful 2) to expiate, make propitiation for
ἱλάσκομαι
hilaskomai
hil-as'-kom-ahee
Middle voice from the same as G2436; to conciliate, that is, (transitively) to atone for (sin), or (intransitively) bepropitious
G2435 ἱλαστήριονἱλαστήριον
hilastērion
hil-as-tay'-ree-on
Neuter of a derivative of G2433; an expiatory (place or thing), that is, (concretely) an atoning victim, or (specifically) the lid of the Ark (in the Temple)
ἵλεως
hileōs
hil'-eh-oce
Perhaps from the alternate form of G138; cheerful (as attractive), that is, propitious; adverbially (by Hebraism) God be gracious!, that is, (in averting some calamity) far be it
KJV Usage: be it far, merciful.
G448 ἀνίλεωςἀνίλεως
anileōs
an-ee'-leh-oce
From G1 (as a negative particle) and G2436; inexorable
KJV Usage: without mercy.
G2431 ἱλαρόςἱλαρός
hilaros
hil-ar-os'
From the same as G2436; propitious or merry (“hilarious”), that is, prompt or willing