gruesome: causing great horror; horribly repugnant; grisly. There was a gruesome murder last night near my street.
demean: to lower in dignity, honor, or standing; debase. The boy was demean by accepting the mean critisisms others told about him.
pervade: to become spread throughout all parts of. When winter is over spring will pervade.
surmise: to think or infer without certain or strong evidence; conjecture; guess. I forgot the answer to a question on my test so I had to surmise.
tremulous: Characterized by trembling, as from fear, nervousness, or weakness. My friend was tremulous after riding the scary rollercoaster.