not mentionable; inappropriate, unfit, or improper for mention, as in polite conversation; unspeakable.
something that is not to be mentioned: That subject was classed among the unmentionables.
(formerly) trousers or breeches.
- un·men·tion·a·ble·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use unmentionable in a sentence
Finally, 27 minutes and 48 seconds into his monologue, Benjamin Netanyahu mentioned the unmentionable: Palestinians.
Yet climate change continues to be the great unmentionable on Capitol Hill and the presidential campaign trail.Climate Change Kills 400,000 a Year, New Report Reveals | Mark Hertsgaard | September 27, 2012 | THE DAILY BEAST
What really set her off was mentioning the unmentionable—that 18 years ago, she shot Mary Jo Buttafuoco.
The unmentionable image rattles down to the core of our brain.
Men and women "publicly practised unmentionable abominations."The Secret of the Totem | Andrew Lang
Polly called her a once unmentionable name that was coming into fashionable use after a long exile.The Cup of Fury | Rupert Hughes
Nibletts certified the cause of death as that unmentionable complaint, the pip.
Each looked as though the other were something unmentionable, left over from the last cleaning of the cesspool.Feet Of Clay | Phillip Hoskins
So we walked to the door, and we threw it open, and we stepped together into the house of the unmentionable Times.Anthem | Ayn Rand
British Dictionary definitions for unmentionable
unsuitable or forbidden as a topic of conversation
(as noun): the unmentionable
- unmentionableness, noun
- unmentionably, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012