unmentionable

adj

By · According to Wiktionary data (CC BY-SA) ·

"unmentionable" is a 13-letter English headword indexed on PlainSpell.

The verdict

“unmentionable” is uncommon English (frequency #94,389 among 1,433 “U” headwords), classed as an adjective. The kind of spelling people second-guess.

#94,389
frequency rank, English
1,433
“U” headwords

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Too embarrassing or shocking to be discussed.

Corpus desk

Index EN-unmentionable · unmentionable · English

unmentionable · rank #94,389 · 0 variants · 0 confusables

  • FREQ-RARE #94,389
  • LEN-MEGA 13 letters
  • VOW-6 6 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-MID 1,433
  • PHOTO-FINISH unloving

Nearest frequency peer: unloving (-1 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Long-tail ranks near “unmentionable”

Sparse band: bars invert rank so rarer forms read shorter

corpus weight

What this shows Long-tail view: where “unmentionable” sits against similarly uncommon English ranks.

Source FrequencyWords open word-frequency list As of September 3, 2026
Key facts for unmentionable
PropertyValue
Headwordunmentionable
LanguageEnglish
Part of speechAdjective
Letters13
Frequency rank#94,389
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “unmentionable” in English

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).unmentionablefalls in this rarity band:

#1#100#1K#10K#100K
← used constantlyrarely used →

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Rare peers in the same band: “unloving” (#94,388), “unpasteurized” (#94,390), “unrewarded” (#94,391). Among 1,433 “U” headwords, “unmentionable” is #94,389. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

unmentionable is uncommon English at frequency #94,389 among 1,433 “U” headwords, classed as anadjective. Rarity is why readers land here mid-draft. Gloss: "Too embarrassing or shocking to be discussed.".

unmentionable doesn't appear in our generated misspelling index, a straightforward case of a spelling with little room for common typos. It is not paired with a close-neighbour confusable in our dataset, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: From un- + mentionable. The correct English form is unmentionable, spelled U-N-M-E-N-T-I-O-N-A-B-L-E.

Definition

  1. 1
    Too embarrassing or shocking to be discussed.

Etymology

From un- + mentionable.

This word in other languages

inconfesable(Español)inavouable(Français)

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "unmentionable"?
"unmentionable" is spelled U-N-M-E-N-T-I-O-N-A-B-L-E.
What does "unmentionable" mean?
As an adjective, "unmentionable" means: Too embarrassing or shocking to be discussed.
What is the origin of the word "unmentionable"?
From un- + mentionable. See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "unmentionable", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 13 letters (nearest by frequency rank).

unpasteurized#94,390undeliverable#94,383streptococcal#94,290artificiality#94,533

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list