b/b/
Press your lips together, add vocal cord vibration, then release.
How to pronounce boundaries in American English
BOWN·duh·reez
Start here
Americans pronounce boundaries as BOWN-duh-reez (/ˈbaʊndəriz/). Stress falls on the first syllable — keep everything else short and quick. You'll hear it in sentences like "Space exploration pushes the boundaries of human knowledge".
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Sound by sound
Every sound in "boundaries".
3 syllables, 8 sounds. Tap a syllable to jump to its row, then explore each sound's mouth shape and how it's made.
ow/aʊ/
Start with a dropped jaw and flat tongue. Glide into a relaxed, slightly rounded lip position as the back of the tongue stretches up.
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.
d/d/
Touch the tip of your tongue to the roof of your mouth just behind your teeth. Add vocal cord vibration as you release.
uh/ʌ/
Relax your lips, jaw, and tongue completely. Drop your jaw slightly and keep the tongue neutral.
r/r/
SyllabicThe schwa before R disappears — R becomes the vowel of the syllable. This is the 'er' sound without a distinct vowel before it.
ee/i/
Pull the corners of your lips back slightly. Arch the middle-front of your tongue high toward the roof of the mouth.
z/z/
Same position as S, but add vocal cord vibration. Feel the buzz.
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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 BOWN — keep everything else short and quick.
bown·DUH·REEZ→BOWN·duh·reez
02
Pronouncing the unstressed 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.
BOWN·DUH·reez→BOWN·duh·reez
Questions
Questions people ask about this.
How is "boundaries" stressed in American English?
Stress falls on the first syllable — say "BOWN" with a longer, fuller vowel and keep every other syllable short and quick. The respell "BOWN-duh-reez" marks the stressed syllable in capitals so the rhythm is easy to read at a glance.
Why does the second syllable in "boundaries" 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 "BOWN-duh-reez" shows the reduced form so you can hear the casual rhythm directly.
Is the American pronunciation of "boundaries" 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 "BOWN-duh-reez" reflects the casual American form; British dictionaries typically print a citation form with crisper consonants and different vowel choices.
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