FOG

I. noun Etymology: probably back-formation from ~gy Date: 1544 1. vapor condensed to fine particles of water suspended in the lower atmosphere that differs from cloud only in being near the ground, a fine spray or a foam for firefighting, a murky condition of the atmosphere or a substance causing it, 3. a state of confusion or bewilderment , something that confuses or obscures , cloudiness or partial opacity in a developed photographic image caused by chemical action or stray radiation, ~less adjective II. verb (~ged; ~ging) Date: 1599 transitive verb to cover, envelop, or suffuse with or as if with ~ , to make obscure or confusing , to make confused, to produce ~ on (as a photographic film) during development, intransitive verb to become covered or thick with ~, 2. to become blurred by a covering of ~ or mist, to become indistinct through exposure to light or radiation