unmask
🇺🇸
/ˌʌnˈmæsk/
🇬🇧
/ˌʌnˈmɑːsk/
to reveal the true identity or nature of someone or something
The detective decided to unmask the thief during the party.
探偵はパーティーで泥棒の正体を暴すことを決めた。