involuntary
/ɪnˈvɒl.ən.tɹi/
"involuntary" is a 11-letter English headword indexed on PlainSpell.
The verdict
“involuntary” is a moderately-common English word, ranked #18,596 in English word frequency and used as an adjective.
- #18,596
- frequency rank, English
- 11
- letters
- 17
- tracked misspellings
- 1
- confusable pair
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Without intention; unintentional.
Visual similarity to commonly confused words
How many letter changes separate each confused pair (Levenshtein distance, normalized).
Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).
| Property | Value |
|---|---|
| Headword | involuntary |
| Language | English |
| Part of speech | Adjective |
| IPA | /ɪnˈvɒl.ən.tɹi/ |
| Letters | 11 |
| Frequency rank | #18,596 |
| Misspellings tracked | 17 |
| Confusable pairs | 1 |
| Source | Wiktionary (kaikki.org) |
Where “involuntary” sits in English frequency
Spelling & Dictionary Insight
The English entry for involuntary is 11 letters long, classified as an adjective, and transcribed in the International Phonetic Alphabet as /ɪnˈvɒl.ən.tɹi/. Corpus data places it at rank #18,596 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 2 distinct senses for this headword, so context determines which meaning a reader should apply.
Our generated misspelling index lists 17 likely wrong-spelling variants for involuntary, with forms such as "innvoluntary", "inovluntary", and "invlountary". Every one of these variants traces to a single-character edit -- an added or dropped letter, a swapped consonant, or a vowel swap -- the kind of slip a spell-checker is built to catch. It also participates in 1 confusable-pair relationship, "involuntarily", since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: From in- + voluntary, from Late Latin involontarius, from in + volontarius. The correct English form is involuntary, spelled I-N-V-O-L-U-N-T-A-R-Y.
Definition
- 1Without intention; unintentional.
- 2Not voluntary or willing; contrary or opposed to explicit will or desire; unwilling.
Etymology
From in- + voluntary, from Late Latin involontarius, from in + volontarius.
This word in other languages
Common misspellings
Also misspelled as: innvoluntary,inovluntary,invlountary,involluntary,involnutary,involunatry,involunntary,involuntarry,involuntaryy,involuntayr,involuntray,involunttary,involutnary,invoulntary,invvoluntary,ivnoluntary,nivoluntary
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of involuntary - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.
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 "involuntary"?
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Using “involuntary”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-N-V-O-L-U-N-T-A-R-Y - every other letter order is a misspelling in standard orthography.
- Say it as /ɪnˈvɒl.ən.tɹi/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
- Don't mix it up with “involuntarily” - see the side-by-side comparison. involuntary vs involuntarily
- Browse more English words and confusable pairs in the same reference. English words
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.