How to pronounce proof in American English

IPA /pruf/ Syllables 1 · proof Stress 1st syllable

PROOF

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Americans pronounce proof as PROOF (/pruf/). You'll hear it in sentences like "The theory seems sound, but lacks proof" or "Do you have proof that this news is true?" — more examples below.

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Sound by sound

Every sound in "proof".

1 syllable, 4 sounds. Explore each sound's mouth shape and how it's made.

p/p/

Press your lips together to stop the air, then release. No vocal cord vibration.

r/r/

Curl or bunch your tongue without letting the tip touch the roof of your mouth. Brace the sides of your tongue against your upper back teeth, and round your lips slightly.

oo/u/

Round your lips into a tight circle. Let your tongue rest in the middle of your mouth, slightly raised.

f/f/

Lift your bottom lip to touch the very bottom of your top front teeth. Blow air through this contact point without voicing.

In real conversation

Hear "proof" in the wild.

Click any sentence to see the full breakdown — every link, every reduction, every flap-T.

"Do you have proof that this news is true?"

doo yoo hav PROOF dhuht dhihs NOOZ ihz TROO

"The burden of proof lies with the prosecution in this case."

dhuh BUR·duhn uhv PROOF LAHYZ wihth dhuh prah·suh·KYOO·shuhn ihn dhihs KAYS

"The theory seems sound, but lacks proof."

dhuh THEE·uh·ree SEEMZ SOWND buht LAKS PROOF

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Questions

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Is the American pronunciation of "proof" different from British English?

American English uses different vowel shapes, a relaxed retroflex R, and connected-speech tricks like flap-T and glottal-stop T that British Received Pronunciation generally avoids. The respell "PROOF" reflects the casual American form; British dictionaries typically print a citation form with crisper consonants and different vowel choices.