liveliness

Noun

liveliness (countable and uncountable, plural livelinesses)

1. The quality of being lively.
   • The response to firing is remarkable, and though the 280 lb. pressure seems more in the nature of a reserve for emergencies than a continuous working figure, even with the present-day apology for coal it seldom fell below 250 lb., and could always be brought up to blowing-off point with little...1947 January and February, Cecil J. Allen, “British Locomotive Practice and Performance”, in Railway Magazine, page 39

   Synonyms:

   animatedness, animation, effervescence, energy, fizz

   Antonyms:

   unliveliness, deanimation, de-energization, devitalization, disanimation