(v. t.) To cover or overspread with clouds; to becloud; to overcast.

addle addle the wits ball up bedarken bedazzle bedim befog befuddle begloom bemist bewilder black black out blacken blanket blind block the light blot out blur bother brown bug camouflage cast a shadow clabber up cloak cloud cloud over cloud up conceal confuse cover cover up curtain darken darken over daze dazzle dim dim out discombobulate discomfit discompose disconcert disguise disorganize disorient dissemble distract attention from disturb eclipse embarrass encloud encompass with shadow enmist ensconce enshroud entangle envelop flummox flurry fluster flutter fog fuddle fuss gloom gloss over haze hide keep under cover mask maze mist mix up moider muddle muddy murk nubilate obfuscate obnubilate obscure obumbrate occult occultate opaque overcast overcloud overshadow oversmoke perplex perturb pother put out puzzle raise hell rattle ruffle screen shade shadow shroud slur over smog smoke somber throw into confusion unsettle upset varnish veil whitewash