alarming

/ə.ˈlɑːm.ɪŋ/

verb

  1. To call to arms for defense

  2. To give (someone) notice of approaching danger

  3. To rouse to vigilance and action; to put on the alert.

  4. To surprise with apprehension of danger; to fill with anxiety in regard to threatening evil; to excite with sudden fear.

  5. To keep in excitement; to disturb.

adjective

  1. Causing apprehension, fear or alarm; frightening