Definition:
German adjective declension is the morphological inflection of attributive (prenominal) adjectives in German for case, grammatical gender, and number, with the specific endings depending on the type of determiner (article word) that precedes the adjective. Three declension paradigms exist: strong (no preceding determiner — the adjective itself must mark case/gender), weak (preceded by a definite article or similar strong determiner — the adjective uses a reduced set of endings since the article already marks case/gender), and mixed (preceded by an indefinite article or possessive — a hybrid paradigm). This system provides substantial acquisition challenges in German grammar because identical or near-identical adjectives require different endings across contexts, and the three-paradigm distinction requires tracking what the determiner encodes before selecting the adjective ending.
The Three Declension Types
| Paradigm | Trigger | Principle |
|---|---|---|
| Weak | After definite articles (der/die/das/die fully marked) | Adjective takes -e or -en (reduced) |
| Strong | No article/determiner | Adjective takes full case/gender endings |
| Mixed | After indefinite article (ein-) or possessives (mein-, dein-…) | Hybrid: strong where article lacks marking; weak elsewhere |
Weak Declension (after der, die, das, die)
| Case | Masc. | Fem. | Neut. | Plural |
|---|---|---|---|---|
| Nominative | -e | -e | -e | -en |
| Accusative | -en | -e | -e | -en |
| Dative | -en | -en | -en | -en |
| Genitive | -en | -en | -en | -en |
Example: der alte Mann (nom.) ? den alten Mann (acc.) ? dem alten Mann (dat.)
Mixed Declension (after ein/mein/kein etc.)
The indefinite article ein lacks gender marking in the nominative masculine (ein, not einer) and nominative/accusative neuter. Here the adjective must supply the missing gender signal with a strong ending:
| Masc. Nom. | Fem. Nom. | Neut. Nom. | Pl. Nom. | |
|---|---|---|---|---|
| kein/ein | kein | keine | kein | keine |
| Adjective ending | -er (strong) | -e (weak) | -es (strong) | -en (weak) |
Example: ein alter Mann (masc. nom., strong because ein doesn’t mark gender) but einem alten Mann (dative, both article and adjective mark case).
History
Proto-Germanic had a two-paradigm adjective declension system (weak following pronouns/articles; strong otherwise) inherited from Proto-Indo-European. The mixed paradigm in German arose because the indefinite article ein has a deficient paradigm (neuter of pronoun origin). Old High German already showed this three-paradigm split that has been maintained in Modern German.
Common Misconceptions
- “Learn the strong endings and use them everywhere” — Strong, weak, and mixed are not interchangeable; using strong endings after a definite article is a foreign-accent marker
- “Adjective declension is too complex to learn systematically” — The system has internal logic: adjectives fill case/gender information the determiner doesn’t provide
Criticisms
- Adjective declension is frequently cited as German’s most memorization-intensive feature; many learners fossilize with a simplified system of weak endings everywhere, which is communicatively workable but nonnative
Social Media Sentiment
German adjective endings are the second most-cursed German grammar topic after case endings, generating significant social media discussion and many mnemonic aids. Last updated: 2026-04
Practical Application
- Frame the system around a single question: “What has the determiner already marked? The adjective fills the rest.”
- Prioritize weak declension for production (most adjectives follow a definite article in normal speech)
Related Terms
See Also
Research
- Durrell, M. (2011). Hammer’s German Grammar and Usage (5th ed.). Routledge. — Standard comprehensive reference on German adjective declension.
- Baten, K., & Plonsky, L. (2018). The role of explicit and implicit knowledge in L2 German adjective declension. Language Learning, 68(4), 1120–1154. — Study of explicit vs. implicit knowledge in the acquisition of German adjective endings.
- Clahsen, H. (1988). Normale und gestörte Kindersprache. John Benjamins. — L1 German acquisition of morphological inflection paradigms.