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 synthetic in American English
sihn·THEH·tuhk
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Americans pronounce synthetic as sihn-THEH-tuhk (/sɪnˈθɛɾək/). In "synthetic", the "t" between vowels sounds like a quick "d" — the tongue briefly taps the ridge behind the upper teeth. This is called the Flap T, a small move that separates 'classroom' from 'native'. It comes out as sihn·THEH·tuhk. Stress falls on the second syllable — keep everything else short and quick. You'll hear it in sentences like "Organic farming avoids the use of synthetic pesticides".
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Sound by sound
Every sound in "synthetic".
3 syllables, 8 sounds. Tap a syllable to jump to its row, then explore each sound's mouth shape and how it's made.
ih/ɪ/
Drop your jaw slightly with relaxed lips. Touch the tongue tip behind the bottom front teeth and arch the top-front toward the roof.
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.
th/θ/
Place the very tip of your tongue slightly between your teeth. Blow air gently around it without voicing.
eh/ɛ/
Drop your jaw moderately. Touch the tongue tip behind the bottom front teeth and lift the mid-front part slightly toward the roof.
t/t/
FlapQuickly bounce the front of your tongue against the roof of your mouth. Don't stop the airflow — just a quick tap.
uh/ʌ/
Relax your lips, jaw, and tongue completely. Drop your jaw slightly and keep the tongue neutral.
k/k/
Raise the back of your tongue to touch the soft palate (velum). Stop the air, then release.
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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
Saying a hard "T" in the middle.
In "synthetic", the "t" between vowels sounds like a quick "d" — the tongue briefly taps the ridge behind the upper teeth. /t/ or /d/ becomes a quick tap [ɾ] — sounds like a soft D. The tongue briefly taps the ridge behind the upper teeth.
sihn-THEH-tuhk→sihn·THEH·tuhk
02
Releasing the final consonant with a puff of air.
In "synthetic", the "k" is not released — the articulators get into position but hold without the burst of air. Air stops but there's no release burst — the articulators hold position.
synthetic→sihn·THEH·tuhk
03
Stressing the wrong syllable.
Stress falls on the second syllable, not the others. Stretch THEH — keep everything else short and quick.
SIHN·theh·TUHK→sihn·THEH·tuhk
04
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.
sihn·THEH·TUHK→sihn·THEH·tuhk
Questions
Questions people ask about this.
How is "synthetic" stressed in American English?
Stress falls on the second syllable — say "THEH" with a longer, fuller vowel and keep every other syllable short and quick. The respell "sihn-THEH-tuhk" marks the stressed syllable in capitals so the rhythm is easy to read at a glance.
Why doesn't the T sound like a T in "synthetic"?
In American English, when /t/ sits between two vowels with the second one unstressed, it turns into a quick D-like flap. So "synthetic" sounds closer to "sihn-THEH-tuhk" than to a crisp-T pronunciation. This is the flap-T rule, one of the most distinctive sounds of casual American speech.
Why does the third syllable in "synthetic" 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 "sihn-THEH-tuhk" shows the reduced form so you can hear the casual rhythm directly.
Is the American pronunciation of "synthetic" 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 "sihn-THEH-tuhk" reflects the casual American form; British dictionaries typically print a citation form with crisper consonants and different vowel choices.
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