How do you pronounce "underline"?

In American English: /ˈʌndɝˌlaɪn/ (UHND-ur-leyen). In British English: /ˌʌndəlˈaɪn/ (uhnd-uhl-EYEN). In Canadian English: /ˈʌndɝˌlaɪn/ (UHND-ur-leyen). In Australian English: /ˌʌndəlˈaɪn/ (uhnd-uhl-EYEN).

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

Yes. In American English it's pronounced /ˈʌndɝˌlaɪn/ (UHND-ur-leyen), while in British English it's /ˌʌndəlˈaɪn/ (uhnd-uhl-EYEN).

How to Pronounce "underline"

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underline

regional

/ˈʌndɝˌlaɪn/

UHND-ur-leyen

Syllable Breakdown

ʌndun·ɝder·laɪnline

Source

80%confidence📘 CMU Pronouncing Dictionary v0.7b

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Last updated: 2026-02-14