underestimate

/ˈəndərˈɛstəˌmeɪt/

an estimation that is too low; an estimate that is less than the true or actual value

中文释义：低估；轻视

The initial cost estimate was a serious underestimate, leading to budget overruns.

最初的成本估算严重低估，导致预算超支。

Many experts consider the official figures to be an underestimate of the true pollution levels.

许多专家认为官方数据低估了真实的污染水平。