How to pronounce Net /ɛ/ vs Not /ɑ/ in American English

/ɛ/

net · bed · red · said

/ɑ/

not · father · hot · job

Start here

The vowels in net /ɛ/ and not /ɑ/ ask for completely different jaw drops and tongue placements. For /ɛ/, the jaw drops moderately and the middle of the tongue lifts slightly toward the roof of the mouth. For /ɑ/, the jaw drops significantly, more than almost any other American English vowel, and the back of the tongue presses down flat. The single biggest fix is the jaw: open way wider for /ɑ/ than you do for /ɛ/, and pairs like not and net finally sound different.

Side by side

How the two sounds differ.

3 small mouth adjustments. Get any one of them wrong and the sound slides into its neighbor.

Dimension

/ɛ/ Net

/ɑ/ Not

Jaw

Drops moderately, just enough to fit a fingertip between your teeth.

Drops significantly. The mouth opens wide vertically.

Tongue

Mid-front lifts slightly. The tip rests against the bottom front teeth.

Presses down flat in the back. The tip still touches the bottom front teeth.

Lip tension

Relaxed and neutral.

Completely relaxed, not rounded at all.

Try saying

bed, said, head, desk, set

hot, father, job, box, rock

Now you try.

Record yourself saying "Net" and "Not" a few times. Listen back — your own ear is the best feedback for nailing the contrast.

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Minimal pairs

Words that change with one sound.

Every pair below differs by exactly one sound: flip /ɛ/ to /ɑ/ and the meaning flips with it. Tap any word for its full breakdown.

/ɛ/ Net

/ɑ/ Not

dahk dock

Why people mix them up

If your ear blurs them, here's why.

Speakers of languages with simpler five-vowel systems (like Spanish or Japanese) usually have a clear 'e' and 'a' sound, but the American versions behave differently. The American not vowel /ɑ/ wants a much deeper jaw drop and a flatter tongue than the standard 'a' in most languages. When learners don't open their mouths enough for /ɑ/, or when English spelling trips them up (the letter 'o' often makes the /ɑ/ sound, as in hot or job), the vowels end up muddied and indistinct. The net vowel /ɛ/ usually goes the other way, pronounced too tightly. The fix is physical: train your jaw to open much wider for /ɑ/ while keeping the tongue pressed down and out of the way.

How to practice

Train the muscle, then the ear.

3 short drills. Do them out loud: feel the change inside your mouth before you try to hear it.

Use the two-finger test: Say bed with your jaw dropped enough for one finger. Then say father and drop your jaw enough to stack two fingers between your teeth. Feel the physical stretch in your cheeks.

Alternate between the two sounds: say eh, ah, eh, ah. You should feel your jaw bouncing up and down, and your tongue moving from a slight forward lift to a flat, downward press.

Read these word pairs out loud, exaggerating the jaw drop on the second word: pet / pot, net / not, red / rod, step / stop. Let your mouth open surprisingly wide for the /ɑ/ words.

FAQ

Common questions about Net vs Not.

Why do words spelled with "o" like "hot" use the "father" vowel?

Because English spelling is notoriously tricky, and in standard American English, the letter "o" in stressed syllables very often makes the /ɑ/ sound. Words like hot, job, stop, and box don't use a rounded "o" sound at all, they use the exact same wide-open, unrounded /ɑ/ as the word father. If you round your lips for hot, it will sound British. Keep the lips relaxed and drop the jaw.

Do I really need to open my mouth extremely wide for the /ɑ/ (father) vowel?

The biggest mistake learners make with /ɑ/ is keeping the jaw too closed, which traps the sound and makes it sound muffled or shifts it toward other vowels. The way Americans actually talk requires a lot of physical jaw movement. For /ɑ/, your mouth should be open wide enough that a doctor could look at your tonsils. If your jaw isn't dropping much lower than it does for /ɛ/, you aren't hitting the true American /ɑ/.

How do I keep my tongue out of the way for /ɑ/?

Let the back of the tongue press down gently toward the floor of your mouth. For /ɛ/ (bed), the front of the tongue naturally lifts a bit, but for /ɑ/ (father), you want a clear, open pathway for the air. One trick that helps: rest the tip of your tongue against the back of your bottom front teeth and gently push the back of the tongue down, as if you're suppressing a yawn.