undermentioned

adj

"undermentioned" is a 14-letter English headword indexed on PlainSpell.

The verdict

“undermentioned” is uncommon English (outside the top frequency list), classed as an adjective. The kind of spelling people second-guess.

Unranked
below top-frequency English
14
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - about to be specified or mentioned, especially in a document; following

Corpus desk

Index EN-undermentioned · undermentioned · English

undermentioned · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 14 letters
  • VOW-6 6 vowels
  • CONFUS-0 No pairs
  • VAR-0 0 variants
  • BOOK-THIN "U" thin
  • PHOTO-UNK Peer pending

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.

Key facts for undermentioned
PropertyValue
Headwordundermentioned
LanguageEnglish
Part of speechAdjective
Letters14
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “undermentioned” in English

undermentionedsits beyond the 100,000 most-frequent English words, in the long tail of technical, archaic, or otherwise rare vocabulary where spelling doubt tends to strike hardest.

Beyond rank #100,000. Source: FrequencyWords open word-frequency list.

Rare enough to double-check

undermentioned is uncommon English outside the top frequency list, classed as anadjective. Rarity is why readers land here mid-draft. Gloss: "about to be specified or mentioned, especially in a document; following".

undermentioned has no tracked misspelling variants, typically a sign the spelling maps closely to how the word sounds. This entry stands alone in our confusable dataset, suggesting its spelling stands apart enough that readers rarely confuse it with something else.

Etymologically, the entry records: From under- + mentioned. The correct English form is undermentioned, spelled U-N-D-E-R-M-E-N-T-I-O-N-E-D.

Definition

  1. 1
    about to be specified or mentioned, especially in a document; following

Etymology

From under- + mentioned.

Synonyms

Antonyms

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "undermentioned"?
"undermentioned" is spelled U-N-D-E-R-M-E-N-T-I-O-N-E-D.
What does "undermentioned" mean?
As an adjective, "undermentioned" means: about to be specified or mentioned, especially in a document; following
What is the origin of the word "undermentioned"?
From under- + mentioned. 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.

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

Source: FrequencyWords open word-frequency list