unmentionable

/ʌnˈmɛnʃənəbəl/
adjective
  1. Too shocking, embarrassing, or offensive to be talked about.
    • The politician's unmentionable past was finally revealed in the newspaper.
    • Some topics are considered unmentionable at formal dinner parties.
    • There was an unmentionable secret in the family that no one ever discussed.
Antonyms
noun
  1. A thing that is too shocking or embarrassing to be named or discussed.
    • In polite society, one does not speak of such unmentionables.
    • The diary contained details of various unmentionables from her youth.
    • The memoir hinted at unmentionables that the family had tried to hide.
What does "unmentionable" mean? | whatsthatwordmean | whatsthatwordmean