overestimate

v. 评价过高,出价过高
n. 估计过高,评价过高,出价过高

I overestimated his abilities he's finding the job very difficult.

我过高估计了他的能力--现在他觉得工作非常困难.

I overestimated the amount of milk we'd need for the weekend.

我过高估计了我们周末的用奶量.