他对此事毫无把握。

He is not sure about the matter.

《新英汉大辞典》

我当时准备如果有必要的话向警方和检察官报告案情，但他们会不会把我当回事我几乎是毫无把握。

I was prepared to report the case to the police and prosecutors if necessary but could hardly be confident whether I would be taken seriously.

youdao

但是，让工资和价格下降是非常困难的事情：谁也不愿第一个削减工资，特别是对价格同时下降并无把握的情况下。

But getting wages and prices to fall is tough: nobody wants to be the first to take a pay cut, especially without some assurance that prices will come down, too.

youdao