overestimate

/ˌəʊ.vəˈres.tɪ.meɪt/

to think that something is or will be greater, more extreme, or more important than it really is

过高估计;过高评价

They were forced to the conclusion that they had overestimated him/his abilities.

他们不得不得出结论：他们高估了他/他的能力。

I overestimated and there was a lot of food left over after the party.

我估计过头，结果聚会后剩了好多吃的。