How do you pronounce "simultaneously"?

In American English: /ˌsaɪməlˈteɪniːəsli/ (seyem-uhl-TAYN-ee-uhsl-ee). In British English: /sˌɪməltˈeɪnɪəsli/ (s-im-UHLT-ayn-i-uhsl). In Canadian English: /ˌsaɪməlˈteɪniːəsli/ (seyem-uhl-TAYN-ee-uhsl-ee). In Australian English: /sˌɪməltˈeɪniəsli/ (s-im-UHLT-ayn-ee-uhsl).

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

Yes. In American English it's pronounced /ˌsaɪməlˈteɪniːəsli/ (seyem-uhl-TAYN-ee-uhsl-ee), while in British English it's /sˌɪməltˈeɪnɪəsli/ (s-im-UHLT-ayn-i-uhsl).

How to Pronounce "simultaneously"

simultaneously

regional

/ˌsaɪməlˈteɪniːəsli/

seyem-uhl-TAYN-ee-uhsl-ee

Syllable Breakdown

saɪmsi·əlmul·teɪnta·iːne·əslous·ily

Source

90%confidence📘 CMU Pronouncing Dictionary v0.7b

All Variants

Browse by Letter

a b c d e f g h i j k l m n o p q r s t u v w x y z

Edit on GitHub Report an issue

Last updated: 2026-02-14