How do you pronounce "assertion"?

In American English: /əˈsɝːʃən/ (uh-SURSH-uhn). In British English: /əsˈɜːʃən/ (uhs-ꞫSH-uhn). In Canadian English: /əˈsɝːʃən/ (uh-SURSH-uhn). In Australian English: /ɐsˈɜːʃən/ (ⱯS-ɜsh).

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

Yes. In American English it's pronounced /əˈsɝːʃən/ (uh-SURSH-uhn), while in British English it's /əsˈɜːʃən/ (uhs-ꞫSH-uhn).

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assertion

regional

/əˈsɝːʃən/

uh-SURSH-uhn

Syllable Breakdown

əas·sɝːʃser·əntion

Source

90%confidence📘 CMU Pronouncing Dictionary v0.7b

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Last updated: 2026-02-12