Answer:

darken

Answer	Crossword Clue
DARKEN	Become ominous
DARKEN	Dim
DARKEN	Obscure

DARKEN	Cloud over
DARKEN	Becloud
DARKEN	Throw shadows on
DARKEN	Add more shading to
DARKEN	... one's door (come to visit)
DARKEN	Fill in
DARKEN	Go from dusk to night
DARKEN	... one's door (stop by)

DARKEN	Shade in
DARKEN	Add black to
DARKEN	Become overcast
DARKEN	Become gloomy.
DARKEN	Obfuscate.
DARKEN	Cast a pall
DARKEN	Douse the lights
DARKEN	Make less clear

DARKEN	Turn to twilight
DARKEN	Shade
DARKEN	Grow dim
DARKEN	What skies do before a storm

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.