immutable
"immutable" is a 9-letter English headword indexed on PlainSpell.
The verdict
“immutable” is a moderately-common English word, ranked #34,930 in English word frequency and used as an adjective.
- #34,930
- frequency rank, English
- 9
- letters
- 12
- tracked misspellings
- 1
- confusable pair
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Unable to be changed without exception.
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 | immutable |
| Language | English |
| Part of speech | Adjective |
| Letters | 9 |
| Frequency rank | #34,930 |
| Misspellings tracked | 12 |
| Confusable pairs | 1 |
| Source | Wiktionary (kaikki.org) |
Where “immutable” sits in English frequency
Spelling & Dictionary Insight
The English entry for immutable is 9 letters long, classified as an adjective. Corpus data places it at rank #34,930 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 12 likely wrong-spelling variants for immutable, with forms such as "immtuable", "immuatble", and "immutabble". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It also participates in 1 confusable-pair relationship, "immovable", since the words sound or look close enough that writers reach for the wrong one mid-sentence.
Etymologically, the entry records: From Middle English immutable, from Latin immūtābilis (“unchangeable”); im- + mutable. The correct English form is immutable, spelled I-M-M-U-T-A-B-L-E.
Definition
- 1Unable to be changed without exception.
- 2Not able to be altered in the memory after its value is set initially.
Etymology
From Middle English immutable, from Latin immūtābilis (“unchangeable”); im- + mutable.
Synonyms
Antonyms
This word in other languages
Common misspellings
Also misspelled as: immtuable,immuatble,immutabble,immutabel,immutablle,immutalbe,immutbale,immutible,immuttable,imumtable,imutable,mimutable
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of immutable - counted as single-character edits (an insertion, a deletion, or a substituted letter). The larger the bar, the easier the typo is to spot; one-edit slips are the ones that sneak past readers.
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
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Using “immutable”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is I-M-M-U-T-A-B-L-E - every other letter order is a misspelling in standard orthography.
- Don't mix it up with “immovable” - see the side-by-side comparison. immutable vs immovable
- 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.