Definitions
1.verbTo call to arms for defense
2.verbTo give (someone) notice of approaching danger
3.verbTo rouse to vigilance and action; to put on the alert.
4.verbTo surprise with apprehension of danger; to fill with anxiety in regard to threatening evil; to excite with sudden fear.
5.verbTo keep in excitement; to disturb.
6.adjectiveCausing apprehension, fear or alarm; frightening