Lexical Definition

‎κονιάω‎ koniáō (kon-ee-ah'-o) to whitewash ^G:V
from (dust

whiten.

• by analogy, lime)
• to whitewash

Abbott-Smith

κονιάω, -ῶ (< κονία, dust, lime), [in LXX: De 27:2, 4 (שִׂיד), Pr 21:9*;]
to plaster or whiten over: of tombs, Mt 23:27; fig., of a hypocrite, Ac 23:3.†

Abbott-Smith References

Liddell-Scott-Jones

κονιάω-άω,

(κονία [Refs] plaster with lime or stucco, [Refs 4th c.BC+] —middle, κ. τοὺς ἐγχελεῶνας have them plastered, [Refs 4th c.BC+]:—passive, [κονιάωαμένοι NT.Matt.23.27. ">NT+3rd c.BC+]

__2 generally, daub over, as with pitch, ἀγγεῖα κεκονιάωαμένα [Refs 1st c.BC+]
__3 metaphorically, κ. τὸ πρόσωπον paint, disguise it, [Refs 2nd c.AD+]:—passive, κεκονιάωαμένοι [κονιάωαμένους">LXX] is falsa lectio for{κεκονιάωμένους} [Refs 4th c.AD+]

_{LSJ Scripture Refs: Matt.23.27 ☩ LXX.Prov.21.9}