unability

noun

"unability" is a 9-letter English headword indexed on PlainSpell.

The verdict

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

Unranked
below top-frequency English
9
letters

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Lack of ability; inability.

Corpus desk

Index EN-unability · unability · English

unability · unranked · 0 variants · 0 confusables

  • FREQ-UNRANKED Unranked
  • LEN-LONG 9 letters
  • VOW-5 5 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 unability
PropertyValue
Headwordunability
LanguageEnglish
Part of speechNoun
Letters9
Misspellings tracked0
Confusable pairs0
SourceWiktionary (kaikki.org)

Long-tail rank of “unability” in English

unabilityfalls 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

unability is uncommon English outside the top frequency list, classed as anoun. Rarity is why readers land here mid-draft. Gloss: "Lack of ability; inability.".

Zero misspellings are on record for unability in our index, typically a sign the spelling maps closely to how the word sounds. We don't track a confusable pairing for this entry, a sign it's visually distinctive enough not to be mixed up with another word.

Etymologically, the entry records: From un- + ability. The correct English form is unability, spelled U-N-A-B-I-L-I-T-Y.

Definition

  1. 1
    Lack of ability; inability.

Recorded use

Wiktionary examples

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

  1. difficulty doth not make me despaire, much lesse my unability: for it is but mine owne.
  2. there being so many whose businesse and profession meerly it is, to be the champions of Truth; which if they neglect, what can be imputed but their sloth, or unability?

Etymology

From un- + ability.

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 "unability"?
"unability" is spelled U-N-A-B-I-L-I-T-Y.
What does "unability" mean?
As a noun, "unability" means: Lack of ability; inability.
What is the origin of the word "unability"?
From un- + ability. 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