p/p/
Press your lips together to stop the air, then release. No vocal cord vibration.
How to pronounce potassium in American English
puh·TA·see·uhm
Start here
Americans pronounce potassium as puh-TA-see-uhm (/pəˈtæsiəm/). Stress falls on the second syllable — keep everything else short and quick. You'll hear it in sentences like "A banana is a good source of potassium".
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Sound by sound
Every sound in "potassium".
4 syllables, 8 sounds. Tap a syllable to jump to its row, then explore each sound's mouth shape and how it's made.
uh/ʌ/
Relax your lips, jaw, and tongue completely. Drop your jaw slightly and keep the tongue neutral.
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.
a/æ/
Drop the jaw noticeably. Keep the body of the tongue low and forward, and don't let the back of the tongue raise toward the soft palate. Pull the lip corners back slightly, almost a starting smile.
s/s/
Place your tongue tip near the roof of your mouth behind your top teeth. Push air through the narrow gap. No voicing.
ee/i/
Pull the corners of your lips back slightly. Arch the middle-front of your tongue high toward the roof of the mouth.
uh/ʌ/
Relax your lips, jaw, and tongue completely. Drop your jaw slightly and keep the tongue neutral.
m/m/
SyllabicThe schwa before M disappears — M becomes the vowel of the syllable. Go straight from the previous consonant to M.
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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
Inserting a vowel before the syllabic consonant.
In "potassium", the short unstressed vowel before "m" disappears — the schwa is absorbed and the "m" becomes the syllable nucleus on its own. Schwa is absorbed — consonant becomes the syllable nucleus.
potassium→puh·TA·see·uhm
02
Stressing the wrong syllable.
Stress falls on the second syllable, not the others. Stretch TA — keep everything else short and quick.
PUH·ta·SEE·UHM→puh·TA·see·uhm
03
Pronouncing the first syllable too fully.
Don't pronounce the first syllable too fully. The unstressed syllable reduces to a schwa — the lazy "uh" sound — in casual speech.
PUH·TA·see·uhm→puh·TA·see·uhm
Questions
Questions people ask about this.
How is "potassium" stressed in American English?
Stress falls on the second syllable — say "TA" with a longer, fuller vowel and keep every other syllable short and quick. The respell "puh-TA-see-uhm" marks the stressed syllable in capitals so the rhythm is easy to read at a glance.
Why does the first syllable in "potassium" reduce to "uh"?
Unstressed syllables in American English collapse toward a schwa — a lazy, neutral "uh" sound. The full vowel is what textbooks teach, but in actual American speech every unstressed vowel reduces. The respell "puh-TA-see-uhm" shows the reduced form so you can hear the casual rhythm directly.
Is the American pronunciation of "potassium" 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 "puh-TA-see-uhm" reflects the casual American form; British dictionaries typically print a citation form with crisper consonants and different vowel choices.
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