scared
adjective
skeəd 
skerd frightened of something or afraid that something bad might happen
scared (of doing something) She is scared of going out alone.scared (of somebody/something) He's scared of heights.scared (to do something) People are scared to use the buses late at night.scared (that…) I'm scared (that) I'm going to fall.The thieves got scared and ran away.a scared lookI was scared to death (= very frightened).We were scared stiff (= very frightened). Idioms
see frightened/nervous/scared of your own shadow at shadow noun, be frightened/scared/terrified out of your wits at wit, be scared/bored witless at witless
Usage note: afraidfrightened scared terrified alarmed paranoidThese words all describe feeling or showing fear.afraid [not before noun] feeling fear; worried that something bad might happen: There's nothing to be afraid of. ◇ Aren't you afraid (that) you'll fall?frightened feeling fear; worried that something bad might happen: a frightened child ◇ She was frightened that the glass would break.scared (rather informal) feeling fear; worried that something bad might happen: The thieves got scared and ran away.afraid, frightened or scared?Scared is more informal, more common in speech, and often describes small fears. Afraid cannot come before a noun. It can only take the preposition of, not about. If you are afraid/frightened/scared of somebody/something/doing something or afraid/frightened/scared to do something, you think you are in danger of being hurt or suffering in some way. If you are frightened/scared about something/doing something, it is less a fear for your personal safety and more a worry that something unpleasant might happen.terrified very frightened: I was terrified (that) she wouldn't come. ◇ She looked at him with wide, terrified eyes.alarmed afraid that something dangerous or unpleasant might happen: She was alarmed at the prospect of travelling alone.paranoid (rather informal) afraid or suspicious of other people and believing that they are trying to harm you, in a way that is not reasonable: You're just being paranoid.afraid/frightened/scared of spiders, etc.frightened/scared/paranoid about …afraid/frightened/scared/terrified that …afraid/frightened/scared to open the door, etc.Don't be afraid/frightened/scared/alarmed.