arouser

/əˈraʊzər/
noun
  1. A person or thing that causes someone to become awake, active, or excited.
    • Her speech was a powerful arouser of public interest in the environment.
    • The strong coffee acted as an arouser for the tired students.
    • The loud alarm clock was an effective arouser every morning.
Antonyms
What does "arouser" mean? | whatsthatwordmean | whatsthatwordmean