f/f/
Lift your bottom lip to touch the very bottom of your top front teeth. Blow air through this contact point without voicing.
How to pronounce fireproof in American English
FAHY·er·proof
Start here
Americans pronounce fireproof as FAHY-er-proof (/ˈfaɪərˌpruf/). Stress falls on the first syllable — keep everything else short and quick. You'll hear it in sentences like "She keeps all her important legal documents in a fireproof safe".
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Record yourself saying "fireproof" and play it back. The mic stays on your device — nothing's uploaded.
Sound by sound
Every sound in "fireproof".
3 syllables, 7 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.
er/ər/
Relax your mouth and lift the tongue back and up. Keep the lips neutral.
p/p/
Press your lips together to stop the air, then release. No vocal cord vibration.
r/r/
Curl or bunch your tongue without letting the tip touch the roof of your mouth. Brace the sides of your tongue against your upper back teeth, and round your lips slightly.
oo/u/
Round your lips into a tight circle. Let your tongue rest in the middle of your mouth, slightly raised.
f/f/
Lift your bottom lip to touch the very bottom of your top front teeth. Blow air through this contact point without voicing.
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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 FAHY — keep everything else short and quick.
fahy·ER·PROOF→FAHY·er·PROOF
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 "fireproof" stressed in American English?
Stress falls on the first syllable — say "FAHY" with a longer, fuller vowel and keep every other syllable short and quick. The respell "FAHY-er-proof" marks the stressed syllable in capitals so the rhythm is easy to read at a glance.
How do I pronounce the R in "fireproof"?
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 "fireproof" 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 "FAHY-er-proof" reflects the casual American form; British dictionaries typically print a citation form with crisper consonants and different vowel choices.
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