How to pronounce lacks in American English

IPA /læks/ Syllables 1 · laks Stress 1st syllable

LAKS

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Americans pronounce lacks as LAKS (/læks/). You'll hear it in sentences like "The theory seems sound, but lacks proof".

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Sound by sound

Every sound in "lacks".

1 syllable, 4 sounds. Explore each sound's mouth shape and how it's made.

l/l/

Place the tip of your tongue against the alveolar ridge just behind your top front teeth, the same contact point as /t/, /d/, and /n/. The difference is what happens to the air: for /l/, you let it flow continuously around the <em>sides</em> of the tongue (that's why /l/ is called a lateral). Turn your voice on the whole time. Lips stay relaxed, no rounding or flaring. For the Dark L variant at the end of a syllable, also pull the back of the tongue up and back toward the soft palate.

a/æ/

Drop the jaw noticeably. Keep the body of the tongue low and forward, and don't let the back of the tongue raise toward the soft palate. Pull the lip corners back slightly, almost a starting smile.

k/k/

Raise the back of your tongue to touch the soft palate (velum). Stop the air, then release.

s/s/

Place your tongue tip near the roof of your mouth behind your top teeth. Push air through the narrow gap. No voicing.

In real conversation

Hear "lacks" in the wild.

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

"The theory seems sound, but lacks proof."

dhuh THEE·uh·ree SEEMZ SOWND buht LAKS PROOF

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Questions

Questions people ask about this.

Is the American pronunciation of "lacks" 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 "LAKS" reflects the casual American form; British dictionaries typically print a citation form with crisper consonants and different vowel choices.