cloud dim shade shadow becloud bedim befog darken eclipse fog haze overcast overcloud shroud veil adumbrate blacken blear blur cloak mist obscure conceal extinguish mantle mask obfuscate screen murk muddy cover confuse envelop muddle deepen lour gray grey shield obstruct enshroud blanket hide dusk gloom film benight obnubilate shelter dull garble umbrage fade blind tarnish shower fuzz protect shutter overhang block camouflage bury suppress disguise ensconce obliterate curtain encase smudge hinder cache occult wrap pettifog stonewall belie complicate fuddle spot smear besmear blot stain convolute discombobulate discolour distort daze dazzle glare discolor taint blemish jumble rattle secrete surround overlay swathe