How to pronounce based in American English

IPA /beɪst/ Syllables 1 · bayst Stress 1st syllable

BAYST

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Americans pronounce based as BAYST (/beɪst/). You'll hear it in sentences like "She revised her thesis based on the professor's suggestions" or "Discrimination based on race or gender is strictly prohibited" — more examples below.

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Sound by sound

Every sound in "based".

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.

ay/eɪ/

Start with your jaw slightly open and the front of your tongue forward and slightly up. Glide upward, your jaw closes a little more and your tongue arches higher toward the roof of the mouth.

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 "based" in the wild.

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

"Discrimination based on race or gender is strictly prohibited."

dih·skrih·muh·NAY·shuhn BAYST ahn RAYS or JEHN·der ihz STRIHKT·lee proh·HIH·buh·tuhd

"I prefer visual learning materials over purely text-based resources."

ahy pruh·FUR VIH·zhoo·uhl LUR·nuhng muh·TEER·ee·uhlz OH·ver PYUUR·lee TEHKST BAYST REE·sor·suhz

"She revised her thesis based on the professor's suggestions."

shee ruh·VAHYZD her THEE·suhs BAYST ahn dhuh pruh·FEH·serz suh·JEHS·chuhnz

"The robo-advisor suggested a portfolio based on my risk tolerance level."

dhuh ROH·boh uhd·VAHY·zer suhg·JEH·stuhd uh port·FOH·lee·oh BAYST ahn mahy RIHSK TAH·ler·uhns LEH·vuhl

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Questions

Questions people ask about this.

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