The Collaborative International Dictionary
Dusken \Dusk"en\, v. t. To make dusk or obscure. [R.]
Not utterly defaced, but only duskened.
--Nicolls.
Wiktionary
vb. To make dusky or obscure.
Usage examples of "dusken".
Ever since I can remember, a pair of them have built in a gigantic syringa near our front door, and I have known the male to sing almost uninterruptedly during the evenings of early summer till twilight duskened into dark.
The Brotherhood is served by a great retinue of bards, physicians, minstrels, messengers, armorers, falconers, austringers, bowyers, cooks, door-keepers, cup-bearers, and huntsmen, besides the best serving-women in Eldaraigne, who work year-round making raiment of dusken at Sleeve Edhrin.
When the sun went behind the crater, the sky was still blue, but it duskened rapidly and the evening star was kindled over eastern ridges.