German spelling promises one thing and pronunciation delivers another at the ends of words. The word Tag ('day') is written with a g but pronounced with a k; Hund ('dog') is written with a d but ends in a t; halb ('half') ends in a p. This is Auslautverhärtung — literally "final hardening" — and it is one of the most regular rules in German phonology: every voiced obstruent at the end of a syllable turns voiceless. English speakers stumble here because English does the opposite, carefully keeping its final consonants voiced (dog, bed, grab all buzz at the end). Once you know the rule, you can predict the pronunciation of thousands of words from their spelling — and you'll understand why the same word seems to change sound when you add an ending.
What "voiced" and "voiceless" mean
Some consonants come in pairs that differ only in whether your vocal cords vibrate:
- b/p — b buzzes (voiced), p is breathy (voiceless). Same lips, same closure.
- d/t — d buzzes, t doesn't.
- g/k — g buzzes, k doesn't.
- z (the [z] sound, spelled s in German)/s — z buzzes, s hisses.
Put your fingers on your throat and say "zzz" then "sss": you'll feel the buzz switch off. Final devoicing simply switches that buzz off at the end of a syllable.
The rule
At the end of a syllable or word, the voiced consonants b, d, g, and s are pronounced as their voiceless partners [p], [t], [k], and [s]. The spelling stays voiced; only the sound hardens.
| Spelled with | Pronounced | Word | Sounds like | Meaning |
|---|---|---|---|---|
| g | [k] | Tag | 'tahk' | day |
| d | [t] | Hund | 'hunt' | dog |
| b | [p] | halb | 'halp' | half |
| b | [p] | gelb | 'gelp' | yellow |
| s | [s] | Haus | 'howss' | house |
| d | [t] | Kind | 'kint' | child |
Tag
[taːk] — spelled with g, said with k; 'day'
Hund
[hʊnt] — spelled with d, said with t; 'dog'
halb
[halp] — spelled with b, said with p; 'half'
Haus
[haʊs] — a sharp, hissing s, never a buzzing z; 'house'
The key insight: the same morpheme alternates
Here is what makes devoicing more than a pronunciation footnote. The rule applies to the end of a syllable, so the moment a vowel follows the consonant — pulling it into the start of the next syllable — the consonant is no longer final, and its voice comes back. That means the same word stem is pronounced differently depending on its ending.
| Final position (devoiced) | Vowel follows (voiced) | Meaning |
|---|---|---|
| Tag [taːk] | Tage [ˈtaːɡə] | day → days |
| Hund [hʊnt] | Hunde [ˈhʊndə] | dog → dogs |
| Kind [kɪnt] | Kinder [ˈkɪndɐ] | child → children |
| gibt [ɡiːpt] | geben [ˈɡeːbn̩] | (he) gives → to give |
| halb [halp] | halbe [ˈhalbə] | half (predicate → attributive) |
Heute ist ein schöner Tag.
'Today is a beautiful day.' Tag ends in [k].
Wir bleiben ein paar Tage.
'We're staying a few days.' Tage now has a voiced [ɡ] because a vowel follows.
Der Hund schläft.
'The dog is sleeping.' Hund ends in [t].
Die Hunde bellen.
'The dogs are barking.' Hunde restores the voiced [d].
This is why German plurals and verb forms can sound like they've swapped a consonant when they've only added a vowel. The stem is constant in spelling and in meaning; only the position of the consonant changed, and devoicing followed.
It applies syllable-by-syllable, including inside compounds
Devoicing isn't only about the last letter of the whole word — it hits the end of every syllable. In compounds and before consonant-initial suffixes, an internal b/d/g can devoice too.
Jugend
[ˈjuːɡn̩t] — final d → [t]; 'youth'
Mädchen
[ˈmɛːtçən] — the d at the end of Mäd- devoices to [t] before -chen; 'girl'
Abend
[ˈaːbn̩t] — final d → [t]; 'evening' (note: the medial b stays voiced)
Lieblingsessen
[ˈliːplɪŋsˈʔɛsn̩] — the b of Lieb- devoices to [p] at the syllable end; 'favourite food'
The -ig ending: devoices AND fronts to -ich
A special, very common case combines two rules. Word-final -ig would devoice its g to [k] — but because the vowel before it is the front vowel i, the resulting sound is realised as the soft ich-Laut [ç], not [k]. So standard -ig is pronounced -ich.
König
[ˈkøːnɪç] — -ig devoices and fronts to the ich-Laut; 'king'
wenig
[ˈveːnɪç] — -ig → -ich; 'little/few'
Könige
[ˈkøːnɪɡə] — add a vowel and the full voiced [ɡ] returns; 'kings'
The alternation is exactly the same logic as Tag/Tage: König ends in a devoiced (and fronted) consonant, but Könige restores the voiced [ɡ] because a vowel follows. (In some southern and Austrian varieties -ig is pronounced with a hard [k]; the -ich version is the standard taught in dictionaries.)
Why English speakers must consciously fix this
English allows — even prefers — voiced final consonants, and uses them to distinguish words: bag vs back, bad vs bat, seed vs seat. So an English speaker's instinct is to let Hund buzz at the end, producing something like "hunned/hund" with a voiced d. To a German ear that sounds off, because German simply does not voice final obstruents. The fix is to clip every final b/d/g into a clean, voiceless [p/t/k] — the same crisp release you'd give the t in English cat or the p in cap.
Common Mistakes
❌ Tag pronounced with a voiced final g [taːɡ]
Wrong — final g devoices to [k] in German.
✅ Tag [taːk]
'Day' — ends in a clean, voiceless 'k': 'tahk'.
❌ Hund ending in a buzzing d, like English 'hund' [hʊnd]
Wrong — English keeps final d voiced; German does not.
✅ Hund [hʊnt]
'Dog' — ends in a crisp 't', like 'hoont'.
❌ halb pronounced with a voiced b [halb]
Wrong — final b hardens to [p].
✅ halb [halp]
'Half' — ends in 'p': 'halp'.
❌ Haus ending in a voiced z-sound [haʊz]
Wrong — final s is the sharp, voiceless hiss, not a buzz.
✅ Haus [haʊs]
'House' — a clean hissing s at the end.
❌ König pronounced with a hard final g [ˈkøːnɪɡ] or [ˈkøːnɪk]
Wrong — standard -ig devoices and fronts to the soft ich-Laut.
✅ König [ˈkøːnɪç]
'King' — the -ig ending sounds like -ich.
Key Takeaways
- Final b, d, g, s → [p], [t], [k], [s] at the end of a syllable or word. The spelling never changes.
- This is automatic and exceptionless for native words — predict it from spelling, don't memorise it.
- The same stem alternates: Tag [taːk] / Tage [ˈtaːɡə], Hund [hʊnt] / Hunde [ˈhʊndə], because a following vowel revives the voice.
- The -ig ending both devoices and fronts: König = [ˈkøːnɪç] (-ich), with the voiced [ɡ] returning in Könige.
- English keeps final consonants voiced (dog, bed), so this is a habit you must consciously override: clip every final b/d/g into a crisp voiceless stop.
Now practice German
Reading grammar gets you part of the way. The exercises are where it sticks — free, no signup needed.
Start learning German→Related Topics
- The ch Sounds: ich-Laut and ach-LautA2 — The two main German ch sounds — the soft ich-Laut and the hard ach-Laut — are fully predictable from the preceding vowel, plus chs = ks, -ig = -ich, and loanword ch.
- Tricky Consonants: w, v, z, j, sA1 — Five German consonant letters that look English but sound different — w = [v], v = [f], z = [ts], j = [j], and voiced s = [z] — and how to retrain them as a set.
- Vowels: Long vs ShortA1 — Why German vowel length is phonemic — it distinguishes words like Stadt and Staat — and how the spelling reliably tells you whether a vowel is long or short.
- Reading German Aloud: Spelling-to-Sound RulesA2 — A consolidated at-a-glance reference of German's reliable spelling-to-sound rules — consonant values, digraphs, vowel-length cues and stress — so you can pronounce almost any written German word on sight.
- ß vs ss: Pronunciation and the sharp sA2 — Why ß and ss both sound like a sharp [s] — and how ß silently tells you the vowel before it is long while ss tells you it is short.