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befog

American  
[bih-fog, -fawg] / bɪˈfɒg, -ˈfɔg /

verb (used with object)

befogged, befogging
  1. to envelop in fog or obscurity; becloud.

    Low-hanging clouds befogged the city.

  2. to render unclear; confuse by irrelevancies or distractions.

    Petty differences befogged the legislators' task.

    Synonyms:
    obfuscate, muddle, blur, confound

befog British  
/ bɪˈfɒɡ /

verb

  1. to surround with fog

  2. to make confused, vague, or less clear

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of befog

First recorded in 1595–1605; be- + fog 1