unsufficiency

noun

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

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

The verdict

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

Unranked
below top-frequency English
13
letters

According to Wiktionary data (CC BY-SA, analyzed September 2, 2026) - Obsolete form of insufficiency.

Corpus desk

Index EN-unsufficiency · unsufficiency · English

unsufficiency · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-MEGA 13 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 unsufficiency
PropertyValue
Headwordunsufficiency
LanguageEnglish
Part of speechNoun
Letters13
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “unsufficiency” sits in English frequency

unsufficiency falls outside the top-100,000 ranked English words, the long-tail zone of technical, archaic, or low-frequency vocabulary, exactly where readers second-guess spellings most.

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

Rare enough to double-check

unsufficiency is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Obsolete form of insufficiency.".

No generated misspelling entries exist for unsufficiency in our index, a sign its spelling follows regular English conventions. Our confusable-pair dataset has no match for it, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: From un- + sufficiency. The correct English form is unsufficiency, spelled U-N-S-U-F-F-I-C-I-E-N-C-Y.

Definition

  1. 1
    Obsolete form of insufficiency.

Recorded use

Wiktionary examples

These source excerpts show how unsufficiency appears in context. They illustrate usage; the definition above remains the entry’s reference meaning.

  1. Whatsoever, to make up the doctrine of man's salvation, is added as in supply of the Scripture's unsufficiency, we reject it.
  2. The pupils are wanting in regularity of attendance and there is an unsufficiency of books.

Etymology

From un- + sufficiency.

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.

PlainSpell is rendered directly from structured Wiktionary extracts and open word-frequency lists, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of September 2, 2026. Primary sources: Wiktionary (via kaikki.org) and FrequencyWords.

Frequently Asked Questions

How do you spell "unsufficiency"?
"unsufficiency" is spelled U-N-S-U-F-F-I-C-I-E-N-C-Y.
What does "unsufficiency" mean?
As a noun, "unsufficiency" means: Obsolete form of insufficiency.
What is the origin of the word "unsufficiency"?
From un- + sufficiency. 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.
Data Source

Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Word ordering uses an open word-frequency list; misspelling variants are generated by edit-distance from the correct headword.

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

Source: FrequencyWords open word-frequency list