How do you pronounce "duplex"?

In American English: /ˈduːˌplɛks/ (DOO-plehks). In British English: /djˈuːplɛks/ (DY-oopl). In Canadian English: /ˈduːˌplɛks/ (DOO-plehks). In Australian English: /djˈuːplɛks/ (DY-oopl).

Is "duplex" pronounced differently in American and British English?

Yes. In American English it's pronounced /ˈduːˌplɛks/ (DOO-plehks), while in British English it's /djˈuːplɛks/ (DY-oopl).

How to Pronounce "duplex"

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duplex

regional

/ˈduːˌplɛks/

DOO-plehks

Syllable Breakdown

duːdu·plɛksplex

Source

80%confidence📘 CMU Pronouncing Dictionary v0.7b

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Last updated: 2026-02-14