undeterred

adj

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

"undeterred" is a 10-letter English headword indexed on PlainSpell.

The verdict

“undeterred” has 13 generated spelling variants in the English index at frequency #49,692. The variants make it a useful spelling check.

#49,692
frequency rank, English
1,433
“U” headwords
13
tracked misspellings
2
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - Not deterred or put off; undiscouraged.

Corpus desk

Index EN-undeterred · undeterred · English

undeterred · rank #49,692 · 13 variants · 2 confusables

  • FREQ-MID #49,692
  • LEN-MEGA 10 letters
  • VOW-4 4 vowels
  • CONFUS-LOW 2 pairs
  • VAR-HIGH 13 variants
  • BOOK-MID 1,433
  • PHOTO-FINISH underpass

Nearest frequency peer: underpass (-1 rank slots)

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.

Rank peers near misspelling magnet “undeterred”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “undeterred” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

undeterred vs undetected
80% similar
undeterred vs undeserved
80% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for undeterred
PropertyValue
Headwordundeterred
LanguageEnglish
Part of speechAdjective
Letters10
Frequency rank#49,692
Misspellings tracked13
Confusable pairs2
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “undeterred”

Every-word frequency runs from the handful of words we use constantly (left) to the long tail used once in a blue moon (right).undeterredlands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

The axis is logarithmic, with each marked tick roughly ten times rarer than the last. Same rarity band neighbours include “underpass” (#49,691), “unhappily” (#49,693), “unoriginal” (#49,694). Among 1,433 “U” headwords, “undeterred” is #49,692. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 13 spelling variants around undeterred, anadjective. Corpus frequency is #49,692 among 1,433 “U” headwords. Dominant gloss: "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

  1. 1
    Not deterred or put off; undiscouraged.

Recorded use

Wiktionary example

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

  1. Undeterred, TfL wants to extend the Elizabeth line to Heathrow Airport, both the north and south from Langley and Staines, and also from the present southeastern limit of Abbey Wood to Ebbsfleet.

Etymology

From un- + deterred.

This word in other languages

impertérrito(Español)unbeirrt(Deutsch)

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.

nudeterred2udneterred2unddeterred1undeetrred2undetered1undetererd2undeterrde2undeterredd1
Edit distance from "undeterred"

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 "undeterred"?
"undeterred" is spelled U-N-D-E-T-E-R-R-E-D.
What does "undeterred" mean?
As an adjective, "undeterred" means: Not deterred or put off; undiscouraged.
What words are commonly confused with "undeterred"?
"undeterred" is commonly confused with "undetected", "undeserved". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What is the origin of the word "undeterred"?
From un- + deterred. 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.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "undeterred", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 10 letters (nearest by frequency rank).

unoriginal#49,694turpentine#49,683tastefully#49,666whimpering#49,720

Similar misspelling depth

Headwords with a similar count of attested misspellings (13 here; floor ≥5).

upwardly13 variantsteetering13 variantswickedly13 variantssunburst13 variants

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

Source: FrequencyWords open word-frequency list