positiveness
🇬🇧/ˈpɒzətɪvnəs/ 🇺🇸/ˈpɑːzətɪvnəs/the fact of being full of hope and confidence, or of giving cause for hope and confidence: The Scottish star said that he liked the positiveness of America.
noun [具体名词] 信心;肯定
She answered my question with positiveness. 她回答我的问题很自信。