κατανθρακοῦσθαι

From LSJ

νίψον ἀνομήματα, μὴ μόναν ὄψιν → wash the sins, not only the face | wash my transgressions, not only my face

Source

Greek > English (Woodhouse Verbs Reversed)

(see also: κατανθρακόω) be charred, be reduced to ashes