blunder
🇺🇸
/ˈblʌndər/
🇬🇧
/ˈblʌndə(r)/
a big mistake made without thinking
His blunder cost the team the game.
他的重大失誤讓球隊輸掉了比賽。
to make a big mistake without thinking
She blundered by sending the email to the wrong person.
她因未加思索將郵件發錯人而犯下大錯。