This page is about one decision English speakers get wrong more than any other when writing Dutch: how many words is a compound? In English, "orange juice," "traffic light," and "long-distance runner" are written as two or three pieces. In Dutch the answer is almost always one closed word: sinaasappelsap, verkeerslicht, langeafstandsloper. The default is to glue everything together, often with a linking -s- or -en- in the seam, and to use a hyphen only in a small set of well-defined situations. Get the default right and you've fixed the most visible mistake in foreign-written Dutch.
The default: close it up
A compound is two or more words functioning as a single concept. English keeps many of these open (kitchen table, bus stop, birthday cake); Dutch closes nearly all of them.
| English (open) | Dutch (closed) |
|---|---|
| orange juice | sinaasappelsap |
| traffic light | verkeerslicht |
| hospital | ziekenhuis (lit. "sick-house") |
| coffee cup | koffiekopje |
| birthday present | verjaardagscadeau |
Ze ligt al een week in het ziekenhuis.
She's been in the hospital for a week now.
Wil je nog een kopje koffie, of liever een glas sinaasappelsap?
Would you like another cup of coffee, or a glass of orange juice instead?
Voor zijn verjaardag kreeg hij een enorm verjaardagscadeau.
For his birthday he got an enormous birthday present.
The head of the compound — the part that determines what it is — comes last, exactly as in English. A ziekenhuis is a kind of huis; koffiekopje is a kind of kopje. So the gender and plural follow the final element: het ziekenhuis, de ziekenhuizen.
The linking glue: -s- and -en-
When two parts join, Dutch often inserts a linking sound (a tussenklank) in the seam. The two common ones are -s- and -en-. They aren't decorative — they're the audible joint between the parts, and they're written.
Linking -s-: appears when you'd say an s between the parts. You hear it, so you write it.
staat + schuld → staatsschuld
state + debt → national debt (note the linking -s-: staat·s·schuld, with three s-region letters in a row).
De staatsschuld is dit jaar weer gestegen.
The national debt has risen again this year.
Watch the spelling of staatsschuld: staat ends in t, the link adds s, and schuld begins with sch. Nothing is dropped — you write all of it: staats-schuld. Other -s- examples: verjaardagscadeau, levensgevaar, dorpsplein, beroepskeuze.
Linking -en-: a historically plural-shaped joint. Its spelling is governed by a separate, detailed convention (the tussen-n rule), but the everyday cases are common words you'll meet early.
pan + koek → pannenkoek
pan + cake → pancake (linking -en-: pannen·koek).
Op zondag bakken we altijd pannenkoeken.
On Sundays we always make pancakes.
There is no fully predictable rule for which link a given compound takes — zonneschijn ("sunshine") takes -en-, zonsondergang ("sunset") takes -s-, from the same base word zon. This is a point where you genuinely have to learn the common compounds, though the linking sound usually matches what a native speaker says aloud, so listening helps. When in doubt, no link at all (koffiekopje, not koffieskopje) is the safest default for a word you haven't heard.
When to use a hyphen
The hyphen is not the English open-compound space. Dutch uses it only in specific, well-defined cases.
1. Clashing vowels at the seam. When gluing the parts together would put two vowels next to each other that could be misread as a single sound, a hyphen separates them. This is the most important case to internalise.
auto + ongeluk → auto-ongeluk
car + accident → car crash (the o-o would misread; the hyphen keeps them apart).
zee + eend → zee-eend
sea + duck → eider duck (e-e clash; hyphenated).
Er was vannacht een ernstig auto-ongeluk op de snelweg.
There was a serious car crash on the motorway last night.
The vowel pairs that trigger a hyphen are the ones a reader would otherwise blend into one sound: a-a, e-e, e-i, o-o, u-u, and similar. Compare with the alternative tool for the same job inside a single morpheme — the trema (coördinatie) — but across a compound seam you use the hyphen, not the trema: na-apen ("to mimic"), not naäpen; zo-even ("just now").
2. Abbreviations, letters, and numerals in a compound.
tv-programma, sms-bericht, A4-formaat, 65-plusser
TV programme, text message, A4 size, over-65 — hyphen after an abbreviation, letter or number.
3. Equal-status pairings (two heads of equal rank). When neither part is the head — they're partners, not modifier-plus-head — a hyphen joins them.
Nederlands-Duits woordenboek
Dutch-German dictionary (both languages equal — a hyphen, like English).
een sociaal-economisch probleem
a socio-economic problem (two equal adjectives joined).
De cursus is Nederlands-Engels, met een sociaal-economisch thema.
The course is Dutch-English, with a socio-economic theme.
Contrast this with a modifier-plus-head compound, which closes up: Nederlandstalig ("Dutch-speaking") is one word because Nederlands modifies talig — it's not an equal pairing.
Common Mistakes
The first error here is, statistically, the most common mistake English speakers make in written Dutch — so common that natives have a name for the creeping wrong-space habit (de Engelse ziekte, "the English disease," when it spreads to Dutch).
❌ lange afstand loper
Incorrect — left open in English style; this is one closed compound in Dutch.
✅ langeafstandsloper
long-distance runner — one word, with a linking -s-.
❌ koffie kopje
Incorrect — a space, copied from English 'coffee cup'.
✅ koffiekopje
coffee cup — closed up, no space.
❌ autoongeluk
Incorrect — closed up, the o-o clash is unreadable.
✅ auto-ongeluk
car crash — hyphen separates the clashing vowels.
❌ staatschuld
Incorrect — the linking -s- was dropped; you need all of staat + s + schuld.
✅ staatsschuld
national debt — keep every letter across the seam.
❌ naäpen
Incorrect — across a compound seam Dutch uses a hyphen, not a trema.
✅ na-apen
to mimic — hyphen at the compound seam (trema is for within a single word).
Key Takeaways
- Default = one closed word. English open compounds (orange juice) become single Dutch words (sinaasappelsap). Never leave a space because English does.
- Linking glue: insert -s- (staatsschuld) or -en- (pannenkoek) when you hear it in the seam; keep every letter (staats-schuld). Which link is partly lexical — learn the common ones.
- Hyphen, not space, and only for: clashing vowels (auto-ongeluk, zee-eend), abbreviations/letters/numbers (tv-programma, 65-plusser), and equal-status pairs (Nederlands-Duits, sociaal-economisch).
- The head comes last and fixes the gender and plural: het ziekenhuis → de ziekenhuizen.
Now practice Dutch
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Start learning Dutch→Related Topics
- The Tussen-n Rule (pannenkoek, paddenstoel)C1 — When a Dutch compound takes a linking -en- between its parts (pannenkoek, boekenkast) and when it takes a bare -e- or nothing (zonneschijn, ruggespraak) — the 2006 plural-based rule, plus the official exception lists for sun/moon words, unique referents, and plant-and-animal names.
- The Trema and the ApostropheB1 — The trema (ë ï ö ü) breaks a vowel sequence into separate syllables so it isn't misread as a digraph — coördinatie, reünie, ruïne — while the apostrophe forms plurals of vowel-final words (foto's, baby's) and certain genitives (Anna's auto). Both are grammatical, not decorative.
- Hyphenation and Word DivisionC1 — How Dutch breaks words at the end of a line (afbreken): split on syllable boundaries, divide doubled consonants, and never break an indivisible digraph like ch, ng, or the lange ij.
- Spelling of Loanwords and AnglicismsC1 — How Dutch spells and inflects borrowed words: English nouns take Dutch plurals (managers, baby's), English verbs conjugate by Dutch rules (updaten → ik update, geüpdatet), and -tie answers English -tion.
- Compounding: Building Solid WordsB1 — Dutch noun compounds are written as a single solid word (keukentafel, never 'keuken tafel'), and they are head-final: the last element is the head and sets the gender and plural (de tafel gives de keukentafel; het huis gives het zomerhuis). This page covers solid spelling, head-final agreement, the linking letters tussen-s and tussen-n, and the few cases where a hyphen is correct.