antibiotics

IPA /ˌæntibaɪˈɑɾɪks/ Syllables 5 · an·tee·bahy·ah·tuhks Stress 4th syllable
an·tee·bahy·AH·tuhks
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Americans pronounce antibiotics as an-tee-bahy-AH-tuhks (/ˌæntibaɪˈɑɾɪks/). The T between vowels softens into a quick D-like flap, so it sounds closer to a D than a crisp T. Stress falls on the fourth syllable — keep everything else short and quick.

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Common mistakes

Pronouncing the silent T after N.

In "antibiotics", the "t" right after N is dropped — the tongue skips the T stop and moves directly from the N position to the next sound. /t/ is completely silent — the tongue skips the T stop and moves directly from the N position to the next sound.

Saying a hard "T" in the middle.

In "antibiotics", 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.

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Why it sounds different

Why "antibiotics" sounds like AN·tee·bahy·AH·tuhks.

In "antibiotics", the "t" right after N is dropped — the tongue skips the T stop and moves directly from the N position to the next sound. This is called the Silent T after N, the kind of sound shift that makes everyday speech feel effortless. It comes out as AN·tee·bahy·AH·tuhks.

In real conversation

Hear "antibiotics" in the wild.

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

"Antibiotics are ineffective against viral infections like the cold."
an·tee·bahy·AH·tuhks er ih·nuh·FEHK·tuhv uh·GEHNST VAHY·ruhl uhn·FEHK·shuhnz LAHYK dhuh KOHLD
"Antibiotics are used to treat bacterial infections effectively."
an·tee·bahy·AH·tuhks er YOOZD tuh TREET bak·TEER·ee·uhl uhn·FEHK·shuhnz uh·FEHK·tuhv·lee
"She felt much better after taking the prescribed antibiotics."
shee FEHLT muhch BEH·der AF·ter TAY·kuhng dhuh pruh·SKRAHYBD an·tee·bahy·AH·tuhks
Same pattern

Words that work the same way.

All of these share phonetic features with this word — same trick.

BAHY·oh·tehk·NAH·luh·jeebiotechnologyuh·KOWN·tuh·BIH·luh·teeaccountabilityMAHY·tuh·KAHN·dree·uhnmitochondrionSAHY·ber·suh·KYUUR·uh·teecybersecurityruh·SPAHN·suh·BIH·luh·teezresponsibilitiesruh·SPAHN·suh·BIH·luh·teeresponsibilityKAHN·stuhnt·leeconstantlyKOWN·ter·TAHPScountertops
Watch out

Common pronunciation mistakes in American English.

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

01

Pronouncing the silent T after N.

In "antibiotics", the "t" right after N is dropped — the tongue skips the T stop and moves directly from the N position to the next sound. /t/ is completely silent — the tongue skips the T stop and moves directly from the N position to the next sound.

antibiotics→AN·tee·bahy·AH·tuhks
02

Saying a hard "T" in the middle.

In "antibiotics", 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.

an-tee-bahy-AH-tuhks→AN·tee·bahy·AH·tuhks
03

Pronouncing the vowel before M/N too pure.

In "antibiotics", the "a" vowel before M or N raises and fronts toward [eə] — the tongue pulls up and forward, breaking the vowel into a tense glide as it anticipates the nasal. The "/æ/" vowel raises and fronts before M or N — tongue pulls up and forward, producing a tense [eə] glide (between /e/ and /ə/). Not a pure /æ/.

an-tee-bahy-AH-tuhks→AN·tee·bahy·AH·tuhks
04

Stressing the wrong syllable.

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

AN·TEE·BahY·AH·TUHKS→AN·tee·bahy·AH·tuhks
Questions

Questions people ask about this.

How is "antibiotics" stressed in American English?
Stress falls on the fourth syllable — say "AH" with a longer, fuller vowel and keep every other syllable short and quick. The respell "an-tee-bahy-AH-tuhks" 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 "antibiotics"?
In American English, when /t/ sits between two vowels with the second one unstressed, it turns into a quick D-like flap. So "antibiotics" sounds closer to "an-tee-bahy-AH-tuhks" 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 fifth syllable in "antibiotics" 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 "an-tee-bahy-AH-tuhks" shows the reduced form so you can hear the casual rhythm directly.
Is the American pronunciation of "antibiotics" 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 "an-tee-bahy-AH-tuhks" reflects the casual American form; British dictionaries typically print a citation form with crisper consonants and different vowel choices.

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