lightheartedness

Từ điển WordNet v3.1 - WordNet Dictionary

noun

the cheerful feeling you have when nothing is troubling you
• Syn:
carefreeness, insouciance, lightsomeness
• Derivationally related forms:
lightsome (for: lightsomeness), lighthearted, insouciant (for: insouciance), carefree (for: carefreeness)
• Hypernyms:
cheerfulness, blitheness