IPA: //ˌmɪsˈɛstɪmeɪt//
KK: /mɪsˈɛstəˌmeɪt/
To make an incorrect judgment about the value, amount, or quality of something.
He misestimated the cost of the project, leading to budget issues.
Past: misestimated
Past Participle: misestimated
Misestimate → It is formed from "mis-" (meaning wrongly) and "estimate" (from Latin "aestimare", meaning to value or assess). The word "misestimate" means to wrongly assess or value something.
Think of making a 'wrong' ('mis-') 'assessment' ('estimate') — that's why misestimate means to incorrectly value something.