German Adjective Endings
German adjective endings are one of the most dreaded topics for learners. Three declension patterns, four cases, three genders, and plural forms — that sounds like a lot of memorization. But there is a unifying principle that makes it manageable: the gender and case signal must appear somewhere, either on the article or on the adjective. Once you understand this rule, the patterns make sense.
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The Core Principle
Every German noun phrase needs to signal its gender and case. If a definite article (der, die, das) is present, it already carries that signal, so the adjective can relax with simple endings (-e or -en). If no article is present, the adjective must carry the signal itself with stronger endings. The indefinite article (ein, eine) falls in between.
Think of it as a relay race. Someone has to carry the baton (the gender/case signal). If the article carries it, the adjective rests. If there is no article, the adjective runs with it.
Weak Declension: After Definite Articles
After der, die, das, dieser, jeder, welcher, and their case forms, adjectives use only two endings: -e and -en.
| Case | Masculine | Feminine | Neuter | Plural |
|---|---|---|---|---|
| Nominativ | der gute Mann | die gute Frau | das gute Kind | die guten Leute |
| Akkusativ | den guten Mann | die gute Frau | das gute Kind | die guten Leute |
| Dativ | dem guten Mann | der guten Frau | dem guten Kind | den guten Leuten |
| Genitiv | des guten Mannes | der guten Frau | des guten Kindes | der guten Leute |
The pattern: -e appears in nominative (all genders) and accusative (feminine and neuter). -en appears everywhere else. That is five slots with -e and eleven with -en.
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Mixed Declension: After Indefinite Articles
After ein, eine, kein, mein, dein, sein, ihr, unser, euer, the adjective sometimes needs to pick up the slack because ein does not distinguish masculine from neuter in nominative.
| Case | Masculine | Feminine | Neuter |
|---|---|---|---|
| Nominativ | ein guter Mann | eine gute Frau | ein gutes Kind |
| Akkusativ | einen guten Mann | eine gute Frau | ein gutes Kind |
| Dativ | einem guten Mann | einer guten Frau | einem guten Kind |
| Genitiv | eines guten Mannes | einer guten Frau | eines guten Kindes |
Notice: in nominative masculine (ein guter) and nominative/accusative neuter (ein gutes), the adjective takes a strong ending because ein alone does not reveal the gender. Everywhere else, the article already shows gender/case, so the adjective falls back to -e or -en.
The three key spots where mixed declension differs from weak: nominative masculine (-er), nominative neuter (-es), and accusative neuter (-es). In all other positions, the endings are identical to the weak pattern (-e or -en).
Strong Declension: No Article
When no article is present (common with uncountable nouns and plurals without articles), the adjective must carry the full gender/case signal.
| Case | Masculine | Feminine | Neuter | Plural |
|---|---|---|---|---|
| Nominativ | guter Wein | gute Milch | gutes Bier | gute Leute |
| Akkusativ | guten Wein | gute Milch | gutes Bier | gute Leute |
| Dativ | gutem Wein | guter Milch | gutem Bier | guten Leuten |
| Genitiv | guten Weines | guter Milch | guten Bieres | guter Leute |
These endings look familiar — they mirror the endings of the definite articles themselves (der, die, das, dem, den). The adjective is doing the article's job.
You will most often encounter strong declension with food and drink (guter Wein, kaltes Wasser, frische Milch) and plurals without articles (alte Freunde, neue Bücher). Practice with these common examples and the pattern becomes natural.
A Simplified Strategy
- Is there a definite article? Use -e or -en (weak). Default to -en; use -e only for nominative singular and accusative feminine/neuter.
- Is there ein/kein/mein? Same as weak, EXCEPT: nominative masculine gets -er, nominative/accusative neuter gets -es.
- No article? The adjective ending mirrors what the definite article would have been.
Frequently Asked Questions
Why do German adjective endings change?
German adjective endings change to show the gender, case, and number of the noun they describe. The ending depends on what comes before the adjective — a definite article (der/die/das), an indefinite article (ein/eine), or no article at all. The article and adjective work together to signal grammatical information.
What is the weak declension?
Weak declension (after definite articles like der, die, das, diese, jede) is the simplest pattern. The adjective ending is either -e or -en. Use -e for nominative singular (all genders) and accusative feminine/neuter. Use -en everywhere else. This covers most everyday situations.
What is the strong declension?
Strong declension occurs when there is no article before the adjective. The adjective itself must carry the gender/case signal that the article would normally provide: -er (masc nom), -es (neut nom/acc), -e (fem nom/acc), -em (masc/neut dat), -en (genitive and dative fem, all plurals). Think of it as the adjective doing the article's job.
What is the mixed declension?
Mixed declension occurs after indefinite articles (ein, eine, kein, mein, dein, etc.). It blends weak and strong patterns. Where the article clearly shows gender (eine = feminine, einem = dative), the adjective takes the weak -e or -en. Where the article is ambiguous (ein = could be masc or neut), the adjective takes the strong ending to clarify.
Do I really need to memorize all the endings?
Rather than memorizing full tables, learn the core principle: the gender/case signal must appear somewhere. If the article shows it clearly (der, die, das, dem, den), the adjective relaxes to -e or -en. If the article is vague or absent, the adjective picks up the signal. Most native speakers internalize this through exposure, and learners can too.