Petrifying
Part of speech: adjective
Definition: Causing immense fear; immobilising with fright; scary; frightening; terrifying
Part of speech: verb
Definition: To harden organic matter by permeating with water and depositing dissolved minerals.
Alarming
Part of speech: adjective
Definition: causing apprehension, fear or alarm; frightening
Part of speech: verb
Definition: To call to arms for defense
Example sentence: We like our individuality, we like the mysteriousness of us, the essentialism of us, and it can be alarming to see the biological gears turning underneath.