terrifying

adjective

Pronunciation: /ˈtɛɹɪfaɪ.ɪŋ/

Frightening or intimidating.
“terrifying creature”
“terrifying dream”
Of a formidable nature; terrific.
“Penguin colonies that number in millions; nights that run into days, and days that run into nights; katabatic winds that scream down the ice sheets at a terrifying 180 miles per hour, and then remain equally terrifyingly still.”