unmentionable.

Considered too embarrassing, offensive, or disturbing to name openly.

Use it for

Words that belong together

• unmentionable subject
• unmentionable acts

On the page

The room held the family's unmentionable history behind a padlocked cabinet.

Usage notes

Primary category: horror / gothic. Forms: Normally non-gradable; no ordinary comparative or superlative. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Commonness: moderately common.