startled

/ˈstɑrtld/
adjective
  1. Feeling a sudden shock or surprise, often causing a quick physical reaction.
    • He gave a startled cry as the cold water hit him.
    • The startled rabbit froze when it saw the headlights.
    • She looked startled when the door suddenly slammed shut.
Antonyms
verb
  1. Past tense and past participle of 'startle' — to cause someone to feel sudden surprise or shock.
    • I didn't mean to startle you; I just wanted to say hello.
    • The loud thunder startled the sleeping dog.
    • The unexpected news startled everyone in the room.