duplex

\dy.plɛks\

/\dy.plɛks\/ noun

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

The verdict

“duplex” is a moderately-common French word, ranked #24,185 in French word frequency and used as a noun.

#24,185
frequency rank, French
6
letters
9
tracked misspellings
4
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed May 6, 2026) - Logement s’étendant sur deux niveaux à l’intérieur d’un bâtiment collectif.

Visual similarity to commonly confused words

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

duplex vs dupe
67% similar
duplex vs dupes
67% similar
duplex vs duper
67% similar

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

Key facts for duplex
PropertyValue
Headwordduplex
LanguageFrench
Part of speechNoun
IPA\dy.plɛks\
Letters6
Frequency rank#24,185
Misspellings tracked9
Confusable pairs4
SourceWiktionary (kaikki.org)

Where “duplex” sits in French 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). duplex 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 French entry for duplex is 6 letters long, classified as a noun, and transcribed in the International Phonetic Alphabet as \dy.plɛks\. Corpus data places it at rank #24,185 in overall French word frequency, marking it as uncommon enough that many writers pause before typing it. Wiktionary records 7 distinct senses for this headword, so context determines which meaning a reader should apply.

Our generated misspelling index lists 9 likely wrong-spelling variants for duplex, with forms such as "dduplex", "dpulex", and "dulpex". 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 4 confusable-pair relationships, "dupe", "dupes", "duper", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.

This entry's etymology isn't recorded, leaving phoneme-to-grapheme mapping as the best guide to its spelling rather than a borrowing history. The correct French form is duplex, spelled D-U-P-L-E-X.

Definition

  1. 1
    Logement s’étendant sur deux niveaux à l’intérieur d’un bâtiment collectif.
  2. 2
    Liaison ou transmission qui fonctionne simultanément dans les deux sens avec un seul canal.
  3. 3
    Dispositif audiovisuel mettant en relation deux plateaux situés à des endroits différents, en télévision.
  4. 4
    Bâtiment composé de deux appartements indépendants juxtaposés ou superposés (« l'un au rez-de chaussée, l’autre à l’étage »).
  5. 5
    Tunnel autoroutier composé de deux niveaux de circulation superposés et unidirectionnels
  6. 6
    Rame de train constituée de voitures à deux niveaux.
  7. 7
    Problème d'échecs dans lequel il existe une solution avec les blancs qui commencent ainsi qu'une autre avec un début par les noirs.

This word in other languages

duplex(English)dúplex(Español)Maisonnette(Deutsch)

Common misspellings

Also misspelled as: dduplex,dpulex,dulpex,dupelx,duplexx,dupllex,duplxe,dupplex,udplex

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of duplex - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.

dduplex1dpulex2dulpex2dupelx2duplexx1dupllex1duplxe2dupplex1
Edit distance from "duplex"

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 French corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "duplex"?
"duplex" is spelled D-U-P-L-E-X. The IPA pronunciation is \dy.plɛks\.
What does "duplex" mean?
As a noun, "duplex" means: Logement s’étendant sur deux niveaux à l’intérieur d’un bâtiment collectif.
What words are commonly confused with "duplex"?
"duplex" is commonly confused with "dupe", "dupes", "duper". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "duplex"?
The IPA (International Phonetic Alphabet) transcription for "duplex" is \dy.plɛks\. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What language does "duplex" come from?
"duplex" is a French word. PlainSpell's reference spans five languages -- English, Spanish, Portuguese, French, and German -- with definitions, pronunciations, and spelling data for each.
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 “duplex”

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

  • The one correct French spelling is D-U-P-L-E-X - every other letter order is a misspelling in standard orthography.
  • Say it as \dy.plɛks\ (IPA); tap the speaker on the pronunciation badge to hear it where audio exists.
  • Don't mix it up with “dupe” - see the side-by-side comparison. duplex vs dupe
  • Browse more French words and confusable pairs in the same reference. French 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