How to pronounce Dutch ui
Dutch ui is pronounced [œy]: start with rounded, pushed-forward lips on the “eu” vowel of French peur, then glide quickly towards a front “y” while keeping the lips rounded. It is not the English “ow” of house, and not “oy”. English has no equivalent, which is why ui is the vowel most learners never quite get.
What is ui in Dutch?
ui is a two-letter spelling (a digraph) for one sound, the diphthong [œy]. It occurs in hundreds of everyday words — huis (house), uit (out), tuin (garden), buiten (outside) — and on its own ui is also a word: de ui, plural uien, means “onion”. Unlike ij/ei or ou/au, the sound has only this one spelling, so when you see ui you always know what to say, and when you hear [œy] you always know how to write it.
Historically, ui is the Dutch reflex of an old long [uː]. Where English turned that vowel into the “ow” of house, mouse and out, and German into the au of Haus and Maus, Dutch first fronted it to a long [yː] and later turned that into [œy]. That is why so many ui-words have obvious English cousins with “ou” — and why English speakers are so tempted to pronounce them with the English vowel.
Why it is so hard
English diphthongs all start from vowels English speakers already make. ui starts from a rounded front vowel that English lacks entirely — roughly the vowel of French peu or German Hölle — and then moves. With no starting point to borrow, the ear defaults to the nearest English gliding vowel, usually the “ow” of house. That substitution is the reason huis pronounced “house” is the loudest foreign-accent marker in Dutch.
Build the sound in five steps
- Round and push. Purse your lips as if to whistle or say “oo”, and push them forward. Keep them tight throughout.
- Front the tongue. With lips still rounded, move the body of your tongue forward and up, towards where you say e in bed. Lips round, tongue front: that combination is the [œ] start.
- Say that steady starting vowel. It should feel like “er” said through a pout — the sound of the French eu in peur.
- Glide upward and forward towards a short i/y [y] position, keeping the lips rounded the whole way. The tongue rises; the lips stay pursed.
- Keep it short and tight. The whole movement is quick. Do not let the lips spread flat — the moment they relax into an English “ow”, the sound collapses.
A shortcut that works for many people: say the word “how” but start it with your lips already pushed forward as if kissing, and keep them there. The pout forces the tongue into roughly the right place.
The single most useful correction: ui is a front, rounded sound. English “ow” is a back, spreading one. If your lips flatten and pull back during the glide, you are making the English vowel. Keep them rounded and forward from start to finish.
Contrast drills: ui, au/ou and eu
Learners routinely merge ui with two neighbours. Drilling minimal-ish sets forces the distinctions apart.
| Sound | IPA | Starts from | Example |
|---|---|---|---|
| ui | [œy] | rounded front vowel, glides up | huis (house) |
| au / ou | [ʌu] / [ɑu] | open back “ah”, glides to “oo” | hout (wood) |
| eu | [øː] | rounded front, steady — no glide | heus (really) |
Say the trio aloud back to back: huis – hout – heus. Note that eu is the same rounded front start as ui but held still, while au/ou is a completely different, back-of-the-mouth vowel. If huis and hout sound the same when you say them, you are using the English “ow” for both. The full diphthong inventory lays out how these gliding vowels relate.
The commonest English-speaker error
Beyond the “ow” substitution, watch for these:
- “oy” as in boy. Some learners over-correct away from “ow” and land on “oy”. tuin is not “toyn” — the start is rounded and front, not the open “aw” of boy.
- Spreading lips. Even learners who nail the start often let the lips flatten on the glide. Keep them pursed to the end.
- Confusing ui with u and uu. Single u [ʏ] (bus) and long uu [y] (vuur) are steady rounded vowels, not diphthongs. Only the digraph ui glides.
North and south
Regional variation on ui is milder than on the g, but it exists. In parts of the Netherlands' Randstad the starting point is fairly open and the glide pronounced. In Flanders (Belgium) and the southern Netherlands the ui is often tighter and more rounded, closer to a pure [œy] with less opening. Both are standard; neither collapses into the English “ow”, which is the only version to avoid.
ui compared with u, uu and oe
Dutch spells four different sounds with the letter u or its neighbours, and learners mix them up in reading aloud. Only ui moves; the others are steady vowels.
| Spelling | IPA | How it sounds | Example |
|---|---|---|---|
| ui | [œy] | rounded “eu” gliding to “y” | buik (belly) |
| u | [ʏ] | short, like a rounded i in bit | bus (bus) |
| uu / open-syllable u | [y] | “ee” said with rounded lips (French tu) | duur (expensive), u (you, formal) |
| oe | [u] | the “oo” of boot, shorter | boek (book) |
Read buik – bus – duur – boek aloud in a row. The long–short logic behind u and uu is explained on the Dutch vowels page.
Graded practice list
Start with ui next to easy consonants, then in clusters, then in longer words.
| Dutch | Hint | English |
|---|---|---|
| ui | [œy] — the bare vowel | onion |
| uit | [œyt] | out |
| huis | [ɦœys] | house |
| muis | [mœys] | mouse |
| tuin | [tœyn] | garden |
| bruin | [brœyn] | brown |
| duif | [dœyf] | pigeon / dove |
| luisteren | [ˈlœystərə(n)] | to listen |
| buiten | [ˈbœytə(n)] | outside |
| druiven | [ˈdrœyvə(n)] | grapes |
| uitnodiging | [ˈœytnoːdəxɪŋ] | invitation |
| geluid | [xəˈlœyt] | sound / noise |
Master ui alongside the other English-lacking sounds — the g and the ij/ei diphthong — and the rest of Dutch pronunciation falls into place. See how it fits the whole gliding-vowel family on the diphthongs page.
Keep going: back to the pronunciation guide, or place this in the wider plan on the learning roadmap.
Frequently asked questions
How do you pronounce ui in Dutch?
Round and push your lips forward, place your tongue at the front of the mouth as for the e of bed, and say the resulting “eu” sound (as in French peur). Then glide quickly towards a rounded “y”, keeping the lips pursed throughout. The IPA symbol is [œy].
Is Dutch ui the same as English ow?
No. English “ow” in house starts at the back of the mouth with open lips. Dutch ui starts at the front with rounded lips. Saying huis like English “house” is the most noticeable foreign accent in Dutch.
What does ui mean in Dutch?
As a word, ui means “onion” (de ui, plural uien). As a spelling, it is the digraph for the diphthong [œy] found in words like huis, uit and tuin.
Is there an English word with the Dutch ui sound?
No English word contains it. The closest anchors are foreign: the eu of French peur for the starting point, followed by a glide towards the u of French tu. A practical shortcut is to say “how” with your lips already pouted and held forward.
What is the difference between ui and eu in Dutch?
Both start from the same rounded front vowel, but eu [øː] stays still, as in heus, while ui [œy] glides upward, as in huis.