1. 名詞
   不可數名詞: 自由自在
   輕鬆愉快
   無憂無慮
   

   同義字詞
   abandon,abandonment,ease,naturalness,spontaneity,spontaneousness,unconstraint,uninhibitedness,unrestraint
   

例句

1. Filmer didn't: there was no lightheartedness in him.
2. The lightheartedness with which one might watch it happen.
3. She adds countless laughs and lightheartedness to the show.
4. There was no joy in the sound, no warmth, no lightheartedness .
5. The wise spouse knows that lightheartedness and grace reduces stress.
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