m

The English /m/ is a voiced bilabial nasal.

That means three main things happen at once:

1. The lips close completely Both lips come together and seal the mouth at the front. Unlike sounds such as /w/, the lips are not just rounded; they are fully closed.

2. The vocal folds vibrate This is a voiced sound, so your vocal folds in the larynx vibrate while you make it.

3. The velum lowers so air goes through the nose This is the crucial feature. The soft palate, or velum, lowers and opens the passage into the nasal cavity. Since the lips are closed, the air cannot leave through the mouth, so it escapes through the nose.

Tongue position

The tongue is usually not the main active articulator for /m/. In a neutral production:

• the tongue body stays relaxed
• the tip may rest lightly behind the lower front teeth or in a neutral position
• the tongue should not press strongly against the roof of the mouth

Jaw and mouth opening

The jaw is generally in a fairly neutral, lightly closed position. Since the lips are sealed, there is not much visible mouth opening. The jaw does not need to be tense.

Lip posture

The lips should be:

• closed all the way
• gently pressed together
• not overly tight

Airflow

For /m/, the airflow is continuous and nasal. You can hold it: mmmmmm. That makes it different from /b/, which cannot be sustained the same way because /b/ is an oral stop.

Common mistakes

• /b/ instead of /m/: the lips close and the sound is voiced, but the velum stays raised, so the air does not go through the nose
• weak voicing
• excess lip tension
• too much jaw movement

Dialectal Variations in Pronunciation and Usage

The good news is that /m/ is one of the most stable consonants in English. Across General American, Received Pronunciation, and most regional accents in both the US and the UK, it is usually produced in essentially the same way.

The biggest differences are usually not in the sound itself, but in:

• how long it is held
• how clearly it is released
• how much neighboring vowels affect it

Across east coast, west coast, southern, midwestern, and many other English varieties, /m/ does not vary nearly as much as vowels do.

Compared with irregular vowels such as /ɑ/ or /ɔ/, /m/ is highly regular.

Considerations for Spanish Speakers

English /m/ and Spanish /m/ are essentially the same sound.

Core similarity

Both are:

• voiced
• bilabial
• nasal

So if you can say mamá in Spanish, you already know how to produce the English /m/.

What can feel slightly different

1. Length and emphasis

• In Spanish, /m/ is often shorter and more consistent
• In English, it can be held longer, especially at the end of words

2. Position in words

• Spanish /m/ is very clear between vowels
• English /m/ appears more often in clusters and at word endings

3. Coarticulation

In both languages, /m/ can change slightly depending on nearby sounds, but the core articulation stays the same.

Bottom line

• the core sound is the same
• the differences come mostly from rhythm, surrounding sounds, and usage patterns, not from the articulation itself