Definition: when you are completely sure about something Level: B2
我无法以任何确定性回答那个问题。
I'm unable to answer that question with any ___certainty.
我可以肯定地说，这个小镇就是波兰文化的瑰宝。
I can say with ___certainty that this town is just a treasure of Polish culture.
无法确定这个项目会成功。
There is no ___certainty that the project will succeed.
