becloud

verb3

1. •
   To cause to become obscure or muddled.

   • […] conscience was not to be perverted by the sophistry which had beclouded my reason. — 1799
2. •
   To cover or surround with clouds.

   • And then while you're a cooking, they say, / Such a fogo beclouds all the room, / That the girls have to group out the way, / In search of the tongs or the broom. — 1824
3. •
   (figurative) To cast in a negative light, cast a pall over, darken.

   • What Fury has possest thee? What strange fit Usurps thy patience, and beclouds thy brow? — 1649