English Word Reference Free

uncertain

Definition, pronunciation, etymology, and usage for the English word. Free spelling reference powered by Wiktionary.

Letters

9 characters

Language

English

word origin

Source

Wiktionary

open dictionary

Access

Free

no sign-up needed

Detailed reference entry for the English word "uncertain", 9-letters, with pronunciation in International Phonetic Alphabet notation, etymology traced through Germanic and Romance roots where applicable, common misspelling variants catalogued from Hunspell error dictionaries, and usage frequency ranked against the top 100,000 English words in the Wordfreq corpus. PlainSpell covers English, Spanish, Portuguese, French, and German spelling with confusable-pair detection that highlights visually and phonetically similar words. This entry for "uncertain" includes synonyms, antonyms, homophones, and cross-language translation pointers sourced from Wiktionary via the kaikki.org extract. Whether you are verifying the correct spelling of "uncertain" for academic writing, checking homophone confusion, or exploring etymological origins, this page provides a citation-backed, free reference that requires no sign-up.

uncertain is anEnglishadj. It means: Not certain; unsure. Pronounced /ʌnˈsɜːtən/. It ranks #7,299 in English word frequency. Often confused with uncertainty.

Key facts for uncertain
PropertyValue
Headworduncertain
LanguageEnglish
Part of speechAdj
IPA/ʌnˈsɜːtən/
Letters9
Frequency rank#7,299
Misspellings tracked13
Confusable pairs1
SourceWiktionary (kaikki.org)

Frequency rank visualization

Position of uncertain in English word frequency (lower rank = more common)

Source: Wordfreq corpus

Spelling & Dictionary Insight

The English entry for uncertain is 9 letters long, classified as anadj, and transcribed in the International Phonetic Alphabet as /ʌnˈsɜːtən/. Corpus data places it at rank #7,299 in overall English word frequency, indicating it appears regularly in written and spoken text.Wiktionary records 6 distinct senses for this headword, so context determines which meaning a reader should apply.

Our Hunspell-derived misspelling index lists 13 documented wrong-spelling variants for uncertain, with forms such as "nucertain", "ucnertain", and "unccertain". Each variant represents a distinct typo pattern that appears often enough in corpora to be worth flagging, typically a doubled-consonant error, a silent-letter drop, or a vowel substitution.It also participates in 1 confusable-pair relationship, "uncertainty", where similar look or sound leads writers to substitute one word for another in context.

Etymologically, the entry records: From Middle English uncerteyn. By surface analysis, un- + certain. Root origin matters for spelling because borrowed morphemes (Greek, Latin, Old French, Old English) carry their source-language orthographic conventions into modern English, which is why historical etymology is often the cleanest predictor of whether a cluster like "-ough", "-eau", or "-tion" will appear. For readers arriving here from a spelling check, the authoritative guidance is: the correct English form is uncertain, spelled U-N-C-E-R-T-A-I-N, and any other sequence of those letters, regardless of how natural it feels, is a misspelling in standard orthography.

Definition

  1. 1
    Not certain; unsure.
  2. 2
    Not known for certain; questionable.
  3. 3
    Not yet determined; undecided.
  4. 4
    Variable and subject to change.
  5. 5
    Fitful or unsteady.
  6. 6
    Unpredictable or capricious.

Etymology

From Middle English uncerteyn. By surface analysis, un- + certain.

Antonyms

This word in other languages

Common misspellings

Also misspelled as: nucertain,ucnertain,unccertain,unceratin,uncerrtain,uncertainn,uncertani,uncertian,uncerttain,uncetrain,uncretain,unecrtain,unncertain

Misspelling Pattern Breakdown

Relative frequency of common misspelling types for uncertain

Misspelling Variants of "uncertain"

nucertain9ucnertain9unccertain10unceratin9uncerrtain10uncertainn10uncertani9uncertian9
Misspelling Variants of "uncertain"

Frequency rank: #7,299 in English

Frequently Asked Questions

How do you spell "uncertain"?
"uncertain" is spelled U-N-C-E-R-T-A-I-N. The IPA pronunciation is /ʌnˈsɜːtən/.
What does "uncertain" mean?
As an adj, "uncertain" means: Not certain; unsure.
What words are commonly confused with "uncertain"?
"uncertain" is commonly confused with "uncertainty". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "uncertain"?
The IPA (International Phonetic Alphabet) transcription for "uncertain" is /ʌnˈsɜːtən/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "uncertain"?
From Middle English uncerteyn. By surface analysis, un- + certain. 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.

Nearby English words

Other entries that begin with the letter U in our English index:

Explore PlainSpell

Data Source: Wiktionary (via kaikki.org), licensed under CC BY-SA & GFDL. Frequency data from Wordfreq. Misspellings derived from Hunspell dictionaries.