uh/ʌ/
Relax your lips, jaw, and tongue completely. Drop your jaw slightly and keep the tongue neutral.
How to pronounce additional in American English
uh·DIH·shuh·nuhl
Start here
Americans pronounce additional as uh-DIH-shuh-nuhl (/əˈdɪʃənəl/). The L in "additional" is a dark L — the back of the tongue rises toward the soft palate, adding a small "uh" quality before the L. This is called the Dark L vs Light L, a small move that separates 'classroom' from 'native'. It comes out as uh·DIH·shuh·nuhl. Stress falls on the second syllable — keep everything else short and quick. You'll hear it in sentences like "Please let me know if you need any additional information" or "I would be happy to provide additional details upon request" — more examples below.
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Sound by sound
Every sound in "additional".
4 syllables, 8 sounds. Tap a syllable to jump to its row, then explore each sound's mouth shape and how it's made.
d/d/
Touch the tip of your tongue to the roof of your mouth just behind your teeth. Add vocal cord vibration as you release.
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.
sh/ʃ/
Flare your lips and lift the mid-front tongue close to the roof of your mouth. Blow air through without voicing.
uh/ʌ/
Relax your lips, jaw, and tongue completely. Drop your jaw slightly and keep the tongue neutral.
n/n/
SyllabicThe schwa before N disappears — N becomes the vowel of the syllable. Go straight from the previous consonant to N.
uh/ʌ/
Relax your lips, jaw, and tongue completely. Drop your jaw slightly and keep the tongue neutral.
l/l/
DarkKeep the tongue tip down and pull the back of the tongue up toward the throat. The 'dark' sound comes from the back.
In real conversation
Hear "additional" in the wild.
Click any sentence to see the full breakdown — every link, every reduction, every flap-T.
"He requested additional resources to complete the project on time."
hee ruh·KWEH·stuhd uh·DIH·shuh·nuhl REE·sor·suhz tuh kuhm·PLEET dhuh PRAH·jehkt ahn TAHYM
"I would be happy to provide additional details upon request."
ahy wuud bee HA·pee tuh pruh·VAHYD uh·DIH·shuh·nuhl DEE·taylz uh·PAHN ruh·KWEHST
"Please let me know if you need any additional information."
PLEEZ LEHT mee NOH ihf yoo NEED EH·nee uh·DIH·shuh·nuhl ihn·fer·MAY·shuhn
"The teacher assigned additional reading to supplement the textbook."
dhuh TEE·cher uh·SAHYND uh·DIH·shuh·nuhl REE·duhng tuh SUH·pluh·mehnt dhuh TEHKST·buuk
"The vendor has agreed to our request for additional services."
dhuh VEHN·der huhz uh·GREED tuh owr ruh·KWEHST fer uh·DIH·shuh·nuhl SUR·vuh·suhz
"Your argument would be stronger with additional supporting evidence."
yor AR·gyuh·muhnt wuud bee STRAHNG·ger wihth uh·DIH·shuh·nuhl suh·POR·tuhng EH·vuh·duhns
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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
Treating every L the same.
The L in "additional" is a dark L — the back of the tongue rises toward the soft palate, adding a small "uh" quality before the L. Dark L adds a small schwa-like "uh" before the L. The back of the tongue lifts toward the soft palate.
additional→uh·DIH·shuh·nuhl
02
Inserting a vowel before the syllabic consonant.
In "additional", the short unstressed vowel before "n" disappears — the schwa is absorbed and the "n" becomes the syllable nucleus on its own. Schwa is absorbed — consonant becomes the syllable nucleus.
additional→uh·DIH·shuh·nuhl
03
Stressing the wrong syllable.
Stress falls on the second syllable, not the others. Stretch DIH — keep everything else short and quick.
UH·dih·SHUH·NUHL→uh·DIH·shuh·nuhl
04
Pronouncing the first syllable too fully.
Don't pronounce the first syllable too fully. The unstressed syllable reduces to a schwa — the lazy "uh" sound — in casual speech.
UH·DIH·shuh·nuhl→uh·DIH·shuh·nuhl
Questions
Questions people ask about this.
How is "additional" stressed in American English?
Stress falls on the second syllable — say "DIH" with a longer, fuller vowel and keep every other syllable short and quick. The respell "uh-DIH-shuh-nuhl" marks the stressed syllable in capitals so the rhythm is easy to read at a glance.
Why does the first syllable in "additional" 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 "uh-DIH-shuh-nuhl" shows the reduced form so you can hear the casual rhythm directly.
Is the American pronunciation of "additional" 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 "uh-DIH-shuh-nuhl" reflects the casual American form; British dictionaries typically print a citation form with crisper consonants and different vowel choices.
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