ĭn-albo

to make white or light, to whiten, brighten (ante- and post-class.): ut primum tenebris abjectis indalbabat, Enn. ap. Achill. Stat. ad Cat. 64, 40 (Ann. v. 219 Vahl.; perh. imitated by Appuleius; v. inalbeo): cerei nocturnas tenebras inalbabant, App. M. 10, p. 248, 30.