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。”
light(轻的) + hearted(有…心情的) → 心情轻松的 → 无忧无虑的
单词造句: