[dusk] adj [ME dosk, alter. of OE dox; akin to L fuscus dark brown, OE dunn dun, dust dust] (13c): dusky
[2]dusk vi (13c): to become dark ~ vt: to make dark or gloomy [3]dusk n (1622) 1: the darker part of twilight esp. at night
2: darkness or semidarkness caused by the shutting out of light