darkened (part of speech: verb)
obscured (part of speech: verb)
dimmed (part of speech: verb)
- She put the jar away, made a mechanical check of the newly installed anti- intrusion devices, dimmed the lights and climbed into her bunk. - "Legacy", James H Schmitz.
- She seemed to be about forty years of age; sorrows had left their traces on her features, and weeping had dimmed her eyes. - "The Magic Skin", Honore de Balzac.
- His eyes were closed in the helplessness of utter exhaustion, and his breath hardly dimmed the mirror that was held to his lips. - "Ellen Middleton--A Tale", Georgiana Fullerton.