underachiever
🇺🇸
/ˌʌndərəˈtʃiːvər/
🇬🇧
/ˌʌndərəˈtʃiːvə(r)/
Someone who doesn't do as well as they should or could, often in school.
Despite his high IQ, he was considered an underachiever because he rarely studied.
高いIQにもかかわらず、彼はほとんど勉強しなかったため、アンダーアチーバーと見なされていた。