Artificial intelligent assistant

dusken

dusken, v. rare.
  (ˈdʌsk(ə)n)
  [f. dusk a.: see -en5.]
  a. trans. To make dusk or obscure. b. intr. To grow dusk.

1550 Nicolls Thucyd. 163 The sayd Epigrame was not vtterly defaced, but onely duskened or so rased, that it myght be redde, thoughe..with..difficultie. 1870 Lowell Study Wind. I. 10 Till twilight duskened into dark.

Oxford English Dictionary

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