lightsomeness > define

noun

• The cheerful feeling you have when nothing is troubling you.
  • synonyms: carefreeness, insouciance, lightheartedness
• The gracefulness of a person or animal that is quick and nimble.
  • synonyms: agility, legerity, lightness, nimbleness
• The trait of being lighthearted and frivolous.
  • synonyms: lightness