Quick Definition
I whiten
Strong's Definition
to whiten
Derivation: from G3022 (λευκός);
KJV Usage: make white, whiten
Thayer's Greek Lexicon
λευκαίνω: 1 aorist ἐλευκανα (cf. Winers Grammar, § 13, 1 d.; Buttmann, 41 (35)); (λευκός); from Homer down; the Sept. for δΔμΐαΔΜιο; to whiten, make white: τί, Mar_9:3; Rev_7:14.
STRONGS NT 3021a: λευκοβυσσινον [λευκοβυσσινον: Rev_19:14, WH marginal reading, others βύσσινον λευκόν, see in βύσσινος.]
Mounce Concise Greek Dictionary
λευκαίνω leukainō 2x
to brighten, to make white, Mar_9:3 ; Rev_7:14
Abbott-Smith Greek Lexicon
λευκαίνω
( < λευκός ),
[in LXX : Psa_51:7 , Isa_1:18 ( H3835 hi .), etc.;]
to whiten, make white: c . acc rei , Mar_9:3 , Rev_7:14 .†
Moulton & Milligan — Vocabulary of the Greek NT
λευχαίνω (~ λευκαίνω ) [page 374]
We have not noted any instance of this verb in our sources, but for the corresponding λευκόω , whiten, cf. Syll 587 .140 (B.C. 329 8) τὸν βωμὸν τοῦ Πλούτωνος . . . λευκῶσαι , ib. 306 .34 (Delphi ii/B.C.) καὶ τὰ ἐνέχυρα αὐτῶν ἐμ πίνακας λελευκωμένους δύο ἀναγνόντω ἐν τᾶι ἐκκλησίαι . The subst. λεύκωμα , a white board used for public notices, is seen in such a passage as Syll 510 .5 (Ephesus ii/B.C.) ἃν δ᾽ ἂν οἱ δικασταὶ κρίνωσιν , ἀναγράψαντες εἰς λεύκωμα οἱ εἰσαγωγεῖς κτλ .
Liddell-Scott — Intermediate Greek Lexicon
λευκαίνω λευκαίνω, [Etym: λευκός] "to make white, whiten", Od. , Eur. , etc. "to make bright or light", ἠὼς λευκαίνει φῶς morn "brightens up" her light, Eur.
STEPBible — Tyndale Abridged Greek Lexicon
λευκαίνω
(λευκός), [in LXX: Psa.51:7, Isa.1:18 (לָבַן hi.), etc. ;]
to whiten, make white: with accusative of thing(s), Mrk.9:3, Rev.7:14.†
(AS)