French u vs ou: how to say tu and tout
For the French 'u' of tu, say 'ee' and then round your lips without letting your tongue move. For the 'ou' of tout, pull your tongue far back and round your lips hard. The lips look almost identical in both; the difference is entirely where your tongue sits — forward for u, back for ou.
Two vowels, not one
English has an 'oo' and no equivalent of the French 'u' at all, so English ears tend to hear both French vowels as the same 'oo' and both mouths produce the same 'oo'. That collapses real words into each other.
tu (you) versus tout (all). rue (street) versus roue (wheel). dessus (on top) versus dessous (underneath). vu (seen) versus vous (you, formal). These are not accent details; they are different words separated by one tongue position.
The good news is that the lips do roughly the same job in both. You only have to control one thing: whether your tongue is at the front of your mouth or the back.
How to make the u of tu
Say 'ee' as in 'see' and hold it. Feel where your tongue is: high, pushed forward, the sides touching your upper back teeth. Freeze it there.
Now, without letting the tongue slide anywhere, purse your lips into a tight little circle, as if you were about to whistle. The sound changes completely. That new sound is the French u.
If what comes out is 'oo', your tongue slid backward the moment your lips moved. That is the whole difficulty. Try it again with a finger resting on your chin to remind you to keep still, or alternate quickly: 'ee-u-ee-u-ee-u', where the only thing changing is your lips. If you hear the vowel jumping between two totally different places, the tongue is moving.
Some learners get there faster by starting from the lips instead: round them for 'oo' first, hold that shape, and then try to say 'ee' through them without unrounding.
How to make the ou of tout
This one is closer to English, but not identical. Pull the back of your tongue up and back, toward the soft palate, and round your lips into a tight circle. Then hold everything absolutely still.
The English 'oo' of 'food' loosens partway through — the lips relax and the sound drifts. The French 'ou' does not move at all from start to finish. It is tenser, deeper, and shorter than you expect.
Say 'vous', 'pour', 'nous' and try to keep the vowel identical from the first millisecond to the last. If you can hear a change of quality inside the vowel, you are gliding.
A useful exaggeration while you learn it: push your lips out further than feels natural and hold them out for the whole vowel, as though you were about to blow out a candle. Overshooting in practice tends to land you in the right place in ordinary speech, where the sound is shorter and less theatrical.
Drilling the pair
Isolation practice is useless here. The point is the contrast, so always drill in pairs.
tu / tout. du / doux. rue / roue. vu / vous. su / sous.
Say each pair five times, slowly, and exaggerate: for the u, pull your tongue so far forward it feels absurd; for the ou, pull it so far back it feels swallowed. Overshoot in practice and the everyday version lands in the right place.
Then build them into short phrases where both appear: 'tu es tout', 'vous avez vu'. The failure almost never happens on a single word — it happens when you have to switch tongue position mid-sentence.
A physical check for the u: while you say it, the tip of your tongue should be pressed against the back of your lower front teeth. It is nearly impossible to say a proper French u without that contact, and nearly impossible to say 'ou' with it.
What to listen for
Record 'tu' and 'tout' back to back and play them. If you cannot tell which is which with your eyes closed, they are the same vowel and the drill has not landed yet.
A second test: say 'tu' and, while the vowel is still sounding, slowly unround your lips without moving your tongue. You should arrive at a clean 'ee'. If you arrive at 'oo' or 'uh' instead, your tongue was never forward in the first place.
This pair also hides inside other sounds. The 'ui' of 'nuit' and 'lui' starts on the tight forward u and glides — 'nuit' is one syllable, not 'noo-ee'. Once the u is solid, the ui glide usually fixes itself.
In TonePerfect, u and ou are two separate scored sounds, and your results are ranked weakest-first, so a collapsed pair usually shows up as one of the two sitting well below your other vowels.
Try these words
Tap to hear each one, then record yourself and see how they score.
Questions
Is the French u the same as the German ü?+
They are built the same way — a front vowel with rounded lips — so learning one gives you the other almost for free. If you have already worked on German 'über', use that exact mouth position for French 'tu'.
Which spellings make which sound?+
The letter u on its own (and û) is the forward vowel of tu. The pair ou (and où, oû) is the back vowel of tout. That mapping is reliable, which makes this one of the few parts of French spelling you can trust on sight.
Does it really change the meaning?+
Yes, and in ordinary everyday words: rue is a street and roue is a wheel; dessus is above and dessous is below. Context often rescues you, but not always, and the pair comes up constantly.
My lips get tired. Am I doing it wrong?+
Probably not — the French u uses tighter lip rounding than English ever asks for, so the muscle fatigue is real at first and fades within a couple of weeks. What you should not feel is strain in your tongue or throat.
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