How to pronounce autonomous in American English

IPA /ɑˈtɑnəməs/ Syllables 4 · ah·tah·nuh·muhs Stress 2nd syllable

ah·TAH·nuh·muhs

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Americans pronounce autonomous as ah-TAH-nuh-muhs (/ɑˈtɑnəməs/). The unstressed syllable reduces to a lazy schwa — almost a quick "uh" — instead of being pronounced fully. Stress falls on the second syllable — keep everything else short and quick.

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Sounds

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Clarity

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Stress

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Intonation

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Fluency

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Common mistakes

Stressing the wrong syllable.

Stress falls on the second syllable, not the others. Stretch TAH — keep everything else short and quick.

Pronouncing the unstressed syllable too fully.

Don't pronounce the second syllable too fully. The unstressed syllable reduces to a schwa — the lazy "uh" sound — in casual speech.

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In real conversation

Hear "autonomous" in the wild.

Click any sentence to see the full breakdown — every link, every reduction, every flap-T.

"Autonomous vehicles are being tested in several major cities."

ah·TAH·nuh·muhs VEE·uh·kuhlz er BEE·uhng TEH·stuhd uhn SEHV·ruhl MAY·jer SIH·deez

Watch out

Common pronunciation mistakes in American English.

The textbook way isn't wrong — it's just not how anyone actually says it.

Stressing the wrong syllable.

Stress falls on the second syllable, not the others. Stretch TAH — keep everything else short and quick.

AH·tah·NUH·MUHS→ah·TAH·nuh·muhs

Pronouncing the unstressed syllable too fully.

Don't pronounce the second syllable too fully. The unstressed syllable reduces to a schwa — the lazy "uh" sound — in casual speech.

ah·TAH·NUH·muhs→ah·TAH·nuh·muhs

Questions

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How is "autonomous" stressed in American English?

Stress falls on the second syllable — say "TAH" with a longer, fuller vowel and keep every other syllable short and quick. The respell "ah-TAH-nuh-muhs" marks the stressed syllable in capitals so the rhythm is easy to read at a glance.

Why does the third syllable in "autonomous" 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 "ah-TAH-nuh-muhs" shows the reduced form so you can hear the casual rhythm directly.

Is the American pronunciation of "autonomous" 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 "ah-TAH-nuh-muhs" reflects the casual American form; British dictionaries typically print a citation form with crisper consonants and different vowel choices.

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Common mistakes

Stressing the wrong syllable.

Pronouncing the unstressed syllable too fully.

Hear "autonomous" in the wild.

Words that work the same way.

Common pronunciation mistakes in American English.

Stressing the wrong syllable.

Pronouncing the unstressed syllable too fully.

Questions people ask about this.

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