Are "sum" and "sun" the same word to you? The final /m/ vs /n/ nobody drills

Most pronunciation practice focuses on vowels and on how a word starts. The nasal consonant sitting at the very end of a word — especially the /m/ vs /n/ contrast — almost never gets isolated practice. So sum and sun, seem and seen, feel different when you say them but land as the same word to a listener.

Why this pair specifically is hard

Many languages simply don't use a word-final /m/ the way English does. In Mandarin, syllables can only end in -n or -ng — a final -m existed historically and survives in Cantonese, but it merged into -n in Mandarin centuries ago. So there's no habit slot for a standalone final /m/, and it defaults to the more familiar /n/. Japanese has a related issue: the moraic "ん" changes its place of articulation depending on what follows it, and on its own tends toward a uvular nasal that's neither a clean /m/ nor a clean /n/. For speakers of both languages, English word-final /m/ and /n/ sit in a genuine blind spot.

What actually distinguishes them

Both /m/ and /n/ are nasals — the soft palate drops, air flows out through the nose, and the vocal cords vibrate. The only difference is where the airflow gets blocked in the mouth:

• /m/: lips pressed fully closed, as if starting to say "mmm"
• /n/: tongue tip pressed against the ridge behind your top front teeth, lips open

So a word ending in /m/ always finishes with your lips shut. A word ending in /n/ always finishes with your lips open. This is a contrast you can check by touch, not by ear.

Minimal pairs to test yourself on

• sum /sʌm/ — sun /sʌn/
• seem /siːm/ — seen /siːn/
• dime /daɪm/ — dine /daɪn/
• warm /wɔːrm/ — warn /wɔːrn/
• gum /ɡʌm/ — gun /ɡʌn/

Say each pair out loud, then touch your lips right after the final sound. The left column should end with lips together; the right column should end with lips apart. If both columns feel the same, you're merging them into one sound.

How to practise it

Don't rush past the final nasal — hold it for an extra beat before releasing. On warm, close your lips fully on the /m/, hold for half a second, feel the air escape through your nose, then open your mouth. That pause makes it obvious whether your lips actually closed. If they didn't, you were saying warn.

Can't tell whether you're actually closing your lips on a final -m, or just defaulting to -n? PHONO reads any English text through your camera and marks every word with IPA, with both US and UK audio, so you can see exactly where a word is supposed to end.

Download: https://apps.apple.com/us/app/phono-english-phonetics-ipa/id6783243417 · phono.douhouse.com