名詞 wantonness:

1. the trait of lacking restraint or control; reckless freedom from inhibition or worry
   同義詞：abandon, unconstraint
2. the quality of being lewd and lascivious
   同義詞：licentiousness

1. I kicked my son because of his wantonness.
   因?yàn)槲覂鹤拥娜涡裕姨吡怂?/div>
2. The wantonness of the girl's character annoyed us.
   那個女孩變化無常的性格讓我們很生氣。