Lexical Definition

‎ἐκκαθαίρω‎ ekkathaírō (ek-kath-ah'-ee-ro) to cleanse ^G:V
from ‎ἐκ‎ and ‎καθαίρω‎

purge (out).

• to cleanse thoroughly

Abbott-Smith

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.†

Abbott-Smith References

Liddell-Scott-Jones

ἐκκαθαίρω-κᾰθαίρω,

Ionic dialectaorist I-εκάθηρα [Refs 5th c.BC+], Attic dialect -εκάθᾱρα[Refs 4th c.BC+]:— cleanse out:

__1 with accusative of the thing cleansed, clear out, οὐρούς τ᾽ ἐξεκάθαιρον [Refs 8th c.BC+]; τὴν κοιλίην Hdt.[same place]; μήτρας, ὀδόντας, [Refs 5th c.BC+]; χθόνα ἐκκαθαίρωκαθαίρει κνωδάλων he clears this land of monsters, [Refs 4th c.BC+]; τὸν βίον (i.e.the world) [Refs 2nd c.AD+]; ἐ.τινά, ὥσπερ ἀνδριάντα, εἰς τὴν κρίσιν clear him of all roughness, polish him up, metaphorically from the finishing touches of a sculptor, [NT+5th c.BC+]; ἐ.λογισμόν clear off an account, [Refs 1st c.AD+]:—passive, to be cleansed, purified, ἐκκαθαίρωκεκαθαρμένοι τὰς ψυχάς [Refs 5th c.BC+]; to be cleared up, explained, [Refs 4th c.BC+]
__2 with accusative of the thing removed, clear away, [Refs 5th c.BC+]; τὴν δωροδοκίαν ἐκκαθαίρω τῆς πόλεως Din.[same place]; κόπρον [Refs]

_{LSJ Scripture Refs: 2Tim.2.21}