s/s/
Place your tongue tip near the roof of your mouth behind your top teeth. Push air through the narrow gap. No voicing.
How to pronounce sustainable in American English
suh·STAY·nuh·buhl
Start here
Americans pronounce sustainable as suh-STAY-nuh-buhl (/səˈsteɪnəbəl/). The L in "sustainable" is a dark L — the back of the tongue rises toward the soft palate, adding a small "uh" quality before the L. This is called the Dark L vs Light L, a hallmark of natural-sounding American speech. It comes out as suh·STAY·nuh·buhl. Stress falls on the second syllable — keep everything else short and quick. You'll hear it in sentences like "She learned about sustainable farming practices" or "He advocates for sustainable practices to protect our planet" — more examples below.
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Sound by sound
Every sound in "sustainable".
4 syllables, 10 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.
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.
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.
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.
uh/ʌ/
Relax your lips, jaw, and tongue completely. Drop your jaw slightly and keep the tongue neutral.
b/b/
Press your lips together, add vocal cord vibration, then release.
uh/ʌ/
Relax your lips, jaw, and tongue completely. Drop your jaw slightly and keep the tongue neutral.
l/l/
DarkKeep the tongue tip down and pull the back of the tongue up toward the throat. The 'dark' sound comes from the back.
In real conversation
Hear "sustainable" in the wild.
Click any sentence to see the full breakdown — every link, every reduction, every flap-T.
"He advocates for sustainable practices to protect our planet."
hee AD·vuh·kayts fer suh·STAY·nuh·buhl PRAK·tuh·suhz tuh pruh·TEHKT ar PLA·nuht
"She buys locally grown produce to support sustainable agriculture."
shee BAHYZ LOH·kuh·lee GROHN PROH·doos tuh suh·PORT suh·STAY·nuh·buhl A·gruh·kuhl·cher
"She learned about sustainable farming practices."
shee LURND uh·BOWT suh·STAY·nuh·buhl FAR·muhng PRAK·tuh·suhz
"Sustainable development balances economic growth with environmental protection."
suh·STAY·nuh·buhl duh·VEH·luhp·muhnt BA·luhn·suhz eh·kuh·NAH·muhk GROHTH wihth uhn·vahy·ruhn·MEHN·tuhl pruh·TEHK·shuhn
"Sustainable energy sources like solar and wind are important."
suh·STAY·nuh·buhl EH·ner·jee SOR·suhz LAHYK SOH·ler and WIHND er uhm·POR·tuhnt
"Sustainable farming practices are being adopted by more producers."
suh·STAY·nuh·buhl FAR·muhng PRAK·tuh·suhz er BEE·uhng uh·DAHP·tuhd bahy MOR pruh·DOO·serz
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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
Treating every L the same.
The L in "sustainable" is a dark L — the back of the tongue rises toward the soft palate, adding a small "uh" quality before the L. Dark L adds a small schwa-like "uh" before the L. The back of the tongue lifts toward the soft palate.
sustainable→suh·STAY·nuh·buhl
02
Stressing the wrong syllable.
Stress falls on the second syllable, not the others. Stretch STAY — keep everything else short and quick.
SUH·stay·NUH·BUHL→suh·STAY·nuh·buhl
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.
SUH·STAY·nuh·buhl→suh·STAY·nuh·buhl
Questions
Questions people ask about this.
How is "sustainable" stressed in American English?
Stress falls on the second syllable — say "STAY" with a longer, fuller vowel and keep every other syllable short and quick. The respell "suh-STAY-nuh-buhl" marks the stressed syllable in capitals so the rhythm is easy to read at a glance.
Why does the first syllable in "sustainable" 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 "suh-STAY-nuh-buhl" shows the reduced form so you can hear the casual rhythm directly.
Is the American pronunciation of "sustainable" 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 "suh-STAY-nuh-buhl" reflects the casual American form; British dictionaries typically print a citation form with crisper consonants and different vowel choices.
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