undeterred
"undeterred" is a 10-letter English headword indexed on PlainSpell.
The verdict
“undeterred” is a moderately-common English word, ranked #49,692 in English word frequency and used as an adjective.
- #49,692
- frequency rank, English
- 10
- letters
- 13
- tracked misspellings
- 2
- confusable pairs
According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Not deterred or put off; undiscouraged.
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 | undeterred |
| Language | English |
| Part of speech | Adjective |
| Letters | 10 |
| Frequency rank | #49,692 |
| Misspellings tracked | 13 |
| Confusable pairs | 2 |
| Source | Wiktionary (kaikki.org) |
Where “undeterred” sits in English frequency
Spelling & Dictionary Insight
The English entry for undeterred is 10 letters long, classified as an adjective. Corpus data places it at rank #49,692 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. The dominant gloss from Wiktionary reads: "Not deterred or put off; undiscouraged.".
Our generated misspelling index lists 13 likely wrong-spelling variants for undeterred, with forms such as "nudeterred", "udneterred", and "unddeterred". Each variant is a distinct typo pattern an edit-distance generator flags, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution. It also participates in 2 confusable-pair relationships, "undetected", "undeserved", where similar look or sound leads writers to substitute one word for another in context.
Etymologically, the entry records: From un- + deterred. The correct English form is undeterred, spelled U-N-D-E-T-E-R-R-E-D.
Definition
- 1Not deterred or put off; undiscouraged.
Etymology
From un- + deterred.
This word in other languages
Common misspellings
Also misspelled as: nudeterred,udneterred,unddeterred,undeetrred,undetered,undetererd,undeterrde,undeterredd,undetrered,undetterred,undteerred,unedterred,unndeterred
Misspelling Pattern Breakdown
How far each generated variant is from the correct spelling of undeterred - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.
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 “undeterred”
The practical upshot for anyone who landed here from a spell-check.
- The one correct English spelling is U-N-D-E-T-E-R-R-E-D - every other letter order is a misspelling in standard orthography.
- Don't mix it up with “undetected” - see the side-by-side comparison. undeterred vs undetected
- 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.