overestimate
//ˌoʊ.vɚˈɛs.tɪ.meɪt//
Verb
overestimateInfinitive
overestimatePresent tense
overestimatedPast tense
overestimatedPast participle
overestimatingPresent participle
overestimatesThird-person singular
1
To estimate something as being greater, better, or more important than it actually is.
I overestimated how much time I had to finish the project.
2
To have too high an opinion of someone's abilities or qualities.
I think you overestimate his leadership skills.
Antonym
Noun
1
An estimate that is too high or excessive.
The initial budget was an overestimate of the actual costs.