lighthearted
🇬🇧/ˌlaɪtˈhɑːtɪd/ 🇺🇸/ˌlaɪtˈhɑːrtɪd/free from care, anxiety, or seriousness : happy-go-lucky.
adjective [原级] 快乐的，心情愉快的；无忧无虑的
"How lighthearted I feel," said the father, "so pleased and cheerful." “ 我感到非常高兴，”父亲说，“非常高兴和愉快。”
