darkening 

英汉解释

v. 变黑；暗色化；灯火管制（darken的ing形式）

同义词

n. blackening
a. gloomy，grim

参考例句

1. We darkened the room by closing the shutters.
我们关上百叶窗，使房间变暗了。
2. The shadow of the Moon can be seen darkening part of Earth.
月亮的影子可以在被黑暗笼罩的地球表面看见。
3. The sun sinks across the darkening moors, and my whole world is wrapped in a veil of gold.
太阳在逐渐阴暗的荒野高原之彼端下沉著，我的世界则被包裹在一层金色面纱之中。

英英解释

n.
  1. changing to a darker color
  2. becoming dark or darker as from waning light or clouding over
  3. characterized by hopelessness; filled with gloom

网络释义

darkening
抹黑; 灯火管制; 发暗; 变黑;
The Darkening
黑暗之门;
darkening urine
释义：尿色变暗;
darkening plant
遮暗设备;
darkening ring
遮光圈;