darken Synonyms

blacken lower overshadow sadden screen shade shading shadow shadowed shadowing shroud overshadowing overshadowed muddying murk nubilate obfuscate obnubilate obscure obscuring obumbrate overcast overcloud slubber snow-blind tarnish become angry grow dark get dark grow dim become gloomy become cloudy make dark become annoyed become dejected shades overcasting cloud up toning veil smog blot out melanize black out swarten cast a shadow cloud over become dispirited adumbrate blackwash