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.
How to pronounce ninety in American English
NAHYN·dee
Start here
Americans pronounce ninety as NAHYN-dee (/ˈnaɪnti/). Stress falls on the first syllable — keep everything else short and quick. You'll hear it in sentences like "The building has ninety apartments" or "He was born in nineteen ninety-three" — more examples below.
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Sound by sound
Every sound in "ninety".
2 syllables, 5 sounds. Tap a syllable to jump to its row, then explore each sound's mouth shape and how it's made.
ahy/aɪ/
Start with your jaw open wide and your tongue resting low and flat. Glide the front of your tongue up toward the roof of your mouth as your jaw closes halfway.
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.
ee/i/
Pull the corners of your lips back slightly. Arch the middle-front of your tongue high toward the roof of the mouth.
In real conversation
Hear "ninety" in the wild.
Click any sentence to see the full breakdown — every link, every reduction, every flap-T.
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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 NAHYN — keep everything else short and quick.
nahyn·DEE→NAHYN·dee
Questions
Questions people ask about this.
How is "ninety" stressed in American English?
Stress falls on the first syllable — say "NAHYN" with a longer, fuller vowel and keep every other syllable short and quick. The respell "NAHYN-dee" marks the stressed syllable in capitals so the rhythm is easy to read at a glance.
Is the American pronunciation of "ninety" 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 "NAHYN-dee" reflects the casual American form; British dictionaries typically print a citation form with crisper consonants and different vowel choices.
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