conjecture

/kənˈd͡ʒɛk.t͡ʃə(ɹ)/

//kənˈd͡ʒɛk.t͡ʃə(ɹ)// noun

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

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

The verdict

“conjecture” is a moderately-common English word, ranked #18,276 in English word frequency and used as a noun.

#18,276
frequency rank, English
10
letters
15
tracked misspellings

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - A statement or an idea which is unproven, but is thought to be true; a guess.

Key facts for conjecture
PropertyValue
Headwordconjecture
LanguageEnglish
Part of speechNoun
IPA/kənˈd͡ʒɛk.t͡ʃə(ɹ)/
Letters10
Frequency rank#18,276
Misspellings tracked15
Confusable pairs0
SourceWiktionary (kaikki.org)

Where “conjecture” 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). conjecture 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 conjecture is 10 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as /kənˈd͡ʒɛk.t͡ʃə(ɹ)/. Corpus data places it at rank #18,276 in overall English word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 4 distinct senses for this headword, so context determines which meaning a reader should apply.

Our generated misspelling index lists 15 likely wrong-spelling variants for conjecture, with forms such as "cconjecture", "cnojecture", and "cojnecture". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. This entry stands alone in our confusable dataset, since its spelling is unusual enough that it doesn't cluster with a lookalike.

Etymologically, the entry records: From Old French, from Latin coniectūra (“a guess”), from coniectus, perfect passive participle of cōniciō (“throw or cast together; guess”), from con- (“together”) + iaciō (“throw, hurl”); see jet. Compare adjective, eject, inject, project, reject, subject,… The correct English form is conjecture, spelled C-O-N-J-E-C-T-U-R-E.

Definition

  1. 1
    A statement or an idea which is unproven, but is thought to be true; a guess.
  2. 2
    A supposition based upon incomplete evidence; a hypothesis.
  3. 3
    A statement likely to be true based on available evidence, but which has not been formally proven.
  4. 4
    Interpretation of signs and omens.

Etymology

From Old French, from Latin coniectūra (“a guess”), from coniectus, perfect passive participle of cōniciō (“throw or cast together; guess”), from con- (“together”) + iaciō (“throw, hurl”); see jet. Compare adjective, eject, inject, project, reject, subject, object, trajectory, deject, abject, surjection, bijection, interject. Compare typologically Russian прики́дывать (prikídyvatʹ) (akin to кида́ть (kidátʹ)).

This word in other languages

conjetura(Español)conjecture(Français)Vermutung(Deutsch)hipótese(Português)

Common misspellings

Also misspelled as: cconjecture,cnojecture,cojnecture,conejcture,conjceture,conjeccture,conjectrue,conjectture,conjectuer,conjecturre,conjecutre,conjetcure,conjjecture,connjecture,ocnjecture

Misspelling Pattern Breakdown

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

cconjecture1cnojecture2cojnecture2conejcture2conjceture2conjeccture1conjectrue2conjectture1
Edit distance from "conjecture"

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 "conjecture"?
"conjecture" is spelled C-O-N-J-E-C-T-U-R-E. The IPA pronunciation is /kənˈd͡ʒɛk.t͡ʃə(ɹ)/.
What does "conjecture" mean?
As a noun, "conjecture" means: A statement or an idea which is unproven, but is thought to be true; a guess.
What are common misspellings of "conjecture"?
Common misspellings include "cconjecture", "cnojecture", "cojnecture", "conejcture", "conjceture". The correct spelling is "conjecture".
How do you pronounce "conjecture"?
The IPA (International Phonetic Alphabet) transcription for "conjecture" is /kənˈd͡ʒɛk.t͡ʃə(ɹ)/. 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 "conjecture"?
From Old French, from Latin coniectūra (“a guess”), from coniectus, perfect passive participle of cōniciō (“throw or cast together; guess”), from con- (“together”) + iaciō (“throw, hurl”); see jet. Compare adjective, eject, inject, project, reject... 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 “conjecture”

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

  • The one correct English spelling is C-O-N-J-E-C-T-U-R-E - every other letter order is a misspelling in standard orthography.
  • Say it as /kənˈd͡ʒɛk.t͡ʃə(ɹ)/ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • 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