G2433–ἱλάσκομαι–hilaskomai

But the tax collector, standing far away, wouldn't even lift up his eyes to heaven, but beat his breast, saying, 'God, be merciful to me, a sinner!'

ἱλάσθητί hilasthēti “do be merciful”

Therefore he was obligated in all things to be made like his brothers, that he might become a merciful and faithful high priest in things pertaining to God, to make atonement for the sins of the people.

ἱλάσκεσθαι hilaskesthai “to make propitiation for”