th/θ/
Place the very tip of your tongue slightly between your teeth. Blow air gently around it without voicing.
How to pronounce theories in American English
THEER·eez
Start here
Americans pronounce theories as THEER-eez (/ˈθɪriz/). Stress falls on the first syllable — keep everything else short and quick. You'll hear it in sentences like "The discovery challenges existing theories about the subject".
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Sound by sound
Every sound in "theories".
2 syllables, 4 sounds. Tap a syllable to jump to its row, then explore each sound's mouth shape and how it's made.
eer/ɪr/
Start with the high 'ih' position. Pull the tongue back and up while flaring the lips slightly.
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 THEER — keep everything else short and quick.
theer·EEZ→THEER·eez
02
Pronouncing the "R" too clearly.
Americans use a relaxed retroflex R — the tongue curls back rather than rolling. The R is one continuous sound with the vowel before it, not two separate sounds.
… (no R)→… r (curl the tongue)
Questions
Questions people ask about this.
How is "theories" stressed in American English?
Stress falls on the first syllable — say "THEER" with a longer, fuller vowel and keep every other syllable short and quick. The respell "THEER-eez" marks the stressed syllable in capitals so the rhythm is easy to read at a glance.
How do I pronounce the R in "theories"?
Americans use a relaxed retroflex R: the tongue curls back rather than rolling, and the R is one continuous sound with the vowel before it — not two separate sounds. Don't try to pronounce a separate vowel followed by a separate R. Treat them as a single shape.
Is the American pronunciation of "theories" 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 "THEER-eez" reflects the casual American form; British dictionaries typically print a citation form with crisper consonants and different vowel choices.
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