wantonly

例句：

1. 1.She wore a white dress with a wantonly beautiful smile.
   她穿着一件白色连衣裙，脸上带着一个无比美丽的微笑。
2. 2. The sunset was wantonly stunning.
   日落非常壮观。
3. 3.His words were wantonly heartfelt.
   他的话语发自内心。