This root form (lemma) is used in 2 different forms in the NT: λευκᾶναι (NAA····), ἐλεύκαναν (IAA3··P).
It is glossed in 2 different ways: ‘to whiten’, ‘they whitened’.
OET MARK 9:3 Greek word=λευκᾶναι (leukanai) Morphology=NAA···· English gloss=‘to whiten’ SR GNT MARK 9:3 word 22
OET REV 7:14 Greek word=ἐλεύκαναν (eleukanan) Morphology=IAA3··P English gloss=‘they whitened’ SR GNT REV 7:14 word 29