Dictionary entry

ἐκκαθαίρω

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

ἐκ-καθαίρω

[in LXX for בָּעַר, etc.;]

1. to cleanse thoroughly, cleanse out: c. acc, ἑαυτόν, II Ti 2:21; of the impurity removed, ζυμήν, I Co 5:7.†