unmentionable
🇺🇸
/ʌnˈmenʃənəbl/
🇬🇧
/ʌnˈmenʃənəbl/
so embarrassing or shocking that it's not talked about
The comedian made a joke about an unmentionable topic, causing some audience members to gasp.
喜劇演員開了一個關於不可提及話題的笑話,導致一些觀眾倒吸一口涼氣。