0 in a way that makes you feel very frightened:
After four chemotherapy treatments, the cancer that had grown so terrifyingly fast in the spring was now no longer detectable.
This is a plot that deepens as surprises explode unexpectedly and terrifyingly.
It skidded terrifyingly along the runway amid clouds of dust.
He was responsible for some of America's most terrifyingly violent crimes.
Last night I dreamed terrifyingly about witchdoctors and ghosts.