excitability

/ɪkˌsaɪtəˈbɪləti/
noun
  1. The quality of being easily excited or made emotional.
    • The puppy's excitability made it hard to keep him calm during thunderstorms.
    • The teacher noticed the excitability of the students before the field trip.
    • Her excitability was obvious when she started jumping up and down after hearing the good news.
Antonyms