felicity

Short definition from Wiktionary

Noun

1. 1
   Happiness; (countable) an instance of this.
2. 2
   An apt and pleasing style in speech, writing, etc.; (countable) an apt and pleasing choice of words.
3. 3
   Good luck; success; (countable) An instance of unexpected good luck; a stroke of luck; also, a lucky characteristic.
4. 4
   Reproduction of a sign with fidelity.
5. 5
   Something that is either a source of happiness or particularly apt.
6. 6
   Period (as opposed to lifetime) utility.

Proper noun

1. 1
   A female given name from English.