G3021–λευκαίνω–leukainō

and his garments became shining, exceeding white [supplied: as snow], such as fuller on earth could not whiten [supplied: them].

λευκᾶναι. leukanai “to whiten.”

And I said to him, My lord, *thou* knowest. And he said to me, These are they who come out of the great tribulation, and have washed their robes, and have made them white in the blood of the Lamb.

ἐλεύκαναν eleukanan “made white”