darken

Clouds darkened the sun.

The sky darkens early in winter.

Please darken the blue paint with black paint.

the abuse darkened the rest of their lives.

misery darkened her gaze.

clouds were darkening, obliterating the sun.

a scandal that darkened the family's good name.

Go! And never darken my door again!

Moonlight glanced off the windows of the darkened building.

The sudden drop in stock prices darkened the future for investors.

the non-enzymatic browning of greengage juice increased and the color darkened with the increase of concentration and processing temperature;

In metastatic melanoma a generalized darkening of the skin (diffuse melanosis cutis) may occur.Usually melanuria is also present.

Patterns in Nature: Lava Pahoehoe lava, the hottest Hawaiian lava type, may darken into ropy strands or wrinkle into silver-sheened taffy, such as this flow in Hawai'i Volcanoes National Park.