How to pronounce boost in American English

IPA /bust/ Syllables 1 · boost Stress 1st syllable

BOOST

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Americans pronounce boost as BOOST (/bust/). You'll hear it in sentences like "She takes vitamins every morning to boost her immune system" or "The government implemented stimulus measures to boost the economy" — more examples below.

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Sound by sound

Every sound in "boost".

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

b/b/

Press your lips together, add vocal cord vibration, then release.

oo/u/

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

s/s/

Place your tongue tip near the roof of your mouth behind your top teeth. Push air through the narrow gap. No voicing.

t/t/

Touch the tip or front edge of your tongue to the roof of your mouth just behind your teeth. Keep your jaw relaxed. Stop the air, then release with a puff.

In real conversation

Hear "boost" in the wild.

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

"She takes vitamins every morning to boost her immune system."

shee TAYKS VAHY·duh·muhnz EHV·ree MOR·nuhng tuh BOOST her uh·MYOON SIH·stuhm

"The government implemented stimulus measures to boost the economy."

dhuh GUH·vern·muhnt IHM·pluh·mehn·tuhd STIH·myuh·luhs MEH·zherz tuh BOOST dhee uh·KAH·nuh·mee

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Questions

Questions people ask about this.

Is the American pronunciation of "boost" 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 "BOOST" reflects the casual American form; British dictionaries typically print a citation form with crisper consonants and different vowel choices.