befog

verb (used with object), be·fogged, be·fog·ging.

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.

verb -fogs, -fogging or -fogged (tr)

1. to surround with fog
2. to make confused, vague, or less clear