undecided

adj

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

The verdict

“undecided” is a moderately-common English word, ranked #22,536 in English word frequency and used as an adjective.

#22,536
frequency rank, English
9
letters
13
tracked misspellings
2
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Open and not yet settled or determined.

Visual similarity to commonly confused words

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

undecided vs undivided
78% similar
undecided vs undefined
78% similar

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

Key facts for undecided
PropertyValue
Headwordundecided
LanguageEnglish
Part of speechAdjective
Letters9
Frequency rank#22,536
Misspellings tracked13
Confusable pairs2
SourceWiktionary (kaikki.org)

Where “undecided” sits in English frequency

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

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

Scale is logarithmic (each tick is 10× rarer). Source: FrequencyWords open word-frequency list.

Spelling & Dictionary Insight

The English entry for undecided is 9 letters long, classified as an adjective. Corpus data places it at rank #22,536 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 13 likely wrong-spelling variants for undecided, with forms such as "nudecided", "udnecided", and "undceided". 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 2 confusable-pair relationships, "undivided", "undefined", a pairing that trips writers up because the two words share enough sound or shape to blur together.

Etymologically, the entry records: From Middle English undecided, equivalent to un- + decided. The correct English form is undecided, spelled U-N-D-E-C-I-D-E-D.

Definition

  1. 1
    Open and not yet settled or determined.
  2. 2
    Uncommitted, not having reached a decision.

Etymology

From Middle English undecided, equivalent to un- + decided.

This word in other languages

Common misspellings

Also misspelled as: nudecided,udnecided,undceided,unddecided,undeccided,undecdied,undecidde,undecidded,undecidedd,undeciedd,undeicded,unedcided,unndecided

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of undecided - measured in single-character edits (insert, delete, or substitute a letter). Larger bars are easier to catch; one-edit slips are the sneakiest.

nudecided2udnecided2undceided2unddecided1undeccided1undecdied2undecidde2undecidded1
Edit distance from "undecided"

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 "undecided"?
"undecided" is spelled U-N-D-E-C-I-D-E-D.
What does "undecided" mean?
As an adjective, "undecided" means: Open and not yet settled or determined.
What words are commonly confused with "undecided"?
"undecided" is commonly confused with "undivided", "undefined". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
What is the origin of the word "undecided"?
From Middle English undecided, equivalent to un- + decided. 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.

Using “undecided”

The practical upshot for anyone who landed here from a spell-check.

  • The one correct English spelling is U-N-D-E-C-I-D-E-D - every other letter order is a misspelling in standard orthography.
  • Don't mix it up with “undivided” - see the side-by-side comparison. undecided vs undivided
  • 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.

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

Source: FrequencyWords open word-frequency list FrequencyWords open word-frequency list