To become gloomy, darker in mood.
To render gloomy, darker in mood.
To cloud, obscure, or perplex; to render less clear or intelligible.
To become dark or darker (having less light).
To make dark or darker by reducing light.
To make dark or darker in colour.
To blind, impair the eyesight.
To become dark or darker in colour.
To be blinded, lose one’s eyesight.
To make foul; to sully; to tarnish.
To get dark (referring to the sky, either in the evening or as a result of cloud).
To become less serious and more cheerful or casual; to relax.
I wish he'd lighten up a bit and realize that we were only joking.