serenity

noun

1. (countable, uncountable)The state of being serene; calmness; peacefulness.

   “Forthwith a change came over the waters, and the serenity became less brilliant but more profound.”

   “There is no passion, there is serenity.”

2. (countable, uncountable)A lack of agitation or disturbance.
3. (countable, uncountable)A title given to a reigning prince or similar dignitary.

name

1. A female given name from English in general use since the 1990s.