" becloud "

1: to make (something) unclear to the understanding;

  * e.g., " ... don't becloud the discussion by raising unrelated issues "

•  Synonyms : 

•  befog,

•  blur,

•  cloud,

•  confuse,

•  fog,

•  muddy,

•  obfuscate

•  Antonyms : 

•  clarify,

•  clear (up),

•  illuminate

2: to make dark, dim, or indistinct;

  * e.g., " ... the smog from the city's steel mills was once so oppressive that it beclouded the local landscape even at noon "

•  Synonyms : 

•  bedim,

•  befog,

•  blacken,

•  blear,

•  blur,

•  cloud,

•  darken,

•  dim,

•  dislimn,

•  fog,

•  fuzz (up),

•  haze,

•  mist,

•  obscure,

•  overcast,

•  overcloud,

•  overshadow,

•  shadow,

•  shroud

•  Antonyms : 

•  brighten,

•  illuminate,

•  illumine,

•  light (up),

•  lighten