p/p/
Press your lips together to stop the air, then release. No vocal cord vibration.
How to pronounce protein in American English
PROH·teen
Start here
Americans pronounce protein as PROH-teen (/ˈproʊˌɾin/). Stress falls on the first syllable — keep everything else short and quick. You'll hear it in sentences like "He drinks a protein shake after every workout session".
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Sound by sound
Every sound in "protein".
2 syllables, 6 sounds. Tap a syllable to jump to its row, then explore each sound's mouth shape and how it's made.
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.
oh/oʊ/
Start with your mouth slightly open, then close your jaw slightly as your lips round. Shift your tongue back slightly, then stretch the back up.
t/t/
FlapQuickly bounce the front of your tongue against the roof of your mouth. Don't stop the airflow — just a quick tap.
ee/i/
Pull the corners of your lips back slightly. Arch the middle-front of your tongue high toward the roof of the mouth.
n/n/
Touch the tip or front edge of your tongue to the roof of your mouth behind your teeth. Air flows through your nose.
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Watch out
Common pronunciation mistakes in American English.
The textbook way isn't wrong — it's just not how anyone actually says it.
01
Stressing the wrong syllable.
Stress falls on the first syllable, not the others. Stretch PROH — keep everything else short and quick.
proh·TEEN→PROH·TEEN
Questions
Questions people ask about this.
How is "protein" stressed in American English?
Stress falls on the first syllable — say "PROH" with a longer, fuller vowel and keep every other syllable short and quick. The respell "PROH-teen" marks the stressed syllable in capitals so the rhythm is easy to read at a glance.
Why doesn't the T sound like a T in "protein"?
In American English, when /t/ sits between two vowels with the second one unstressed, it turns into a quick D-like flap. So "protein" sounds closer to "PROH-teen" than to a crisp-T pronunciation. This is the flap-T rule, one of the most distinctive sounds of casual American speech.
Is the American pronunciation of "protein" 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 "PROH-teen" reflects the casual American form; British dictionaries typically print a citation form with crisper consonants and different vowel choices.
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