How do you pronounce "instantaneous"?

In American English: /ˌɪnstənˈtæniːəs/ (inst-uhn-TAN-ee-uhs). In British English: /ˌɪnstəntˈeɪniəs/ (inst-uhnt-AYN-ee-uhs). In Canadian English: /ˌɪnstənˈtæniːəs/ (inst-uhn-TAN-ee-uhs). In Australian English: /ˌɪnstəntˈeɪniəs/ (inst-uhnt-AYN-ee-uhs).

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

Yes. In American English it's pronounced /ˌɪnstənˈtæniːəs/ (inst-uhn-TAN-ee-uhs), while in British English it's /ˌɪnstəntˈeɪniəs/ (inst-uhnt-AYN-ee-uhs).

How to Pronounce "instantaneous"

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instantaneous

regional

/ˌɪnstənˈtæniːəs/

inst-uhn-TAN-ee-uhs

Syllable Breakdown

ɪnstin·ənstan·tænta·iːne·əsous

Source

80%confidence📘 CMU Pronouncing Dictionary v0.7b

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Last updated: 2026-02-14