darken
[verb]
Synonyms: make dark, blacken, dim, obscure, overshadow

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Antonyms: illuminate

[TahlilGaran] English Synonym Dictionary ▲

dark‧en /ˈdɑːkən $ ˈdɑːr-/ verb
[Word Family: adjective: dark, darkened, darkening; noun: dark, darkness; verb: darken; adverb: darkly]

1. [intransitive and transitive] to become dark, or to make something dark:
The sky darkened and a few drops of rain fell.
a darkened theater
The evening shadows darkened the room.

2. [intransitive and transitive] to become less hopeful or positive, or to make something like this:
As he got drunker, his mood darkened.

3. [intransitive] if someone’s face darkens, they start to look angry:
The captain’s face darkened as he read.

4. never darken my door again old-fashioned said when you do not want to see someone again – now used humorously

[TahlilGaran] Dictionary of Contemporary English ▲