How do you pronounce "onset"?

In American English: /ˈɑːnˌsɛt/ (AHN-seht). In British English: /ˈɒnsˌɛt/ (ONS-eht). In Canadian English: /ˈɑːnˌsɛt/ (AHN-seht). In Australian English: /ˈɒnsɛt/ (ONS-eht).

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

Yes. In American English it's pronounced /ˈɑːnˌsɛt/ (AHN-seht), while in British English it's /ˈɒnsˌɛt/ (ONS-eht).

How to Pronounce "onset"

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onset

regional

/ˈɑːnˌsɛt/

AHN-seht

Syllable Breakdown

ɑːnon·sɛtset

Source

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Last updated: 2026-02-14