It is an adjective3 meanings- horrible or frightful to the senses; repulsive; very ugly: a hideous monster. shocking or revolting to the moral sense: a hideous crime.distressing; appalling: the...
Not really. An anapest is a 3 syllable foot with the first 2 unstressed, and the 3rd stressed. As in Lord Byron's
"...and his cohorts were gleaming in purple and gold"
and his CO horts were GLEA...