German Adjective Endings Made Simple

If you have ever stared at a German sentence wondering why it is guter Wein but der gute Wein, you have hit the single biggest “tell” that separates beginners from confident speakers. English never asks this of you — a big house, the big house, big houses uses the same word every time. German makes the adjective change shape, and most textbooks respond by dumping three 4×4 grids on you and saying “memorize these.” That is 48 cells of misery, and it is the wrong way in.

Here is the good news: those three tables are not three separate things. They are one system answering one question. Learn the question and the tables fall out of it.

The one question that replaces three tables

German wants the gender-and-case marker — the ending that looks like der, das, die, dem, den — to show up exactly once in the noun phrase. Not zero times, not twice. So before every adjective, ask yourself: is the article already carrying that marker?

• If a definite article like der, die, or das is doing the job, the adjective relaxes. It only needs -e or -en. Grammarians call this weak.
• If there is no article at all, nothing else shows gender or case, so the adjective copies the der/die/das ending itself. This is strong.
• If you have ein, kein, or a possessive like mein, it is mixed — weak most of the time, strong in the three spots where ein happens to show nothing.

That is the whole article. The rest is just seeing it in action.

First, when does an adjective even take an ending?

This is the precondition learners skip, and it causes a classic overcorrection. An adjective only declines when it sits in front of a noun (attributive position). After sein, werden, or bleiben, the adjective stands alone and stays bare — no ending, ever.

German	English	Why
Das Auto ist schnell.	The car is fast.	after sein → bare
das schnelle Auto	the fast car	before noun → ending
Der Hund ist groß.	The dog is big.	after sein → bare
der große Hund	the big dog	before noun → ending

So Der Hund ist großer is wrong — it should be groß, with no ending, because it comes after sein. Run the flowchart only when the adjective is actually in front of a noun.

Weak — when the article already shows it

After der/die/das (and friends like dieser, jeder, welcher, alle), the article is broadcasting gender and case loud and clear, so the adjective gets lazy. There are only two possible endings: -e and -en. The rule: use -e in the nominative singular (all three genders) and the accusative singular for feminine and neuter — everything else is -en.

Case	Masculine	Feminine	Neuter	Plural
Nominative	der gute Mann	die gute Frau	das gute Kind	die guten Kinder
Accusative	den guten Mann	die gute Frau	das gute Kind	die guten Kinder
Dative	dem guten Mann	der guten Frau	dem guten Kind	den guten Kindern
Genitive	des guten Mannes	der guten Frau	des guten Kindes	der guten Kinder

So you say Ich habe den freundlichen Mann gesehen and Wir haben das schnelle Auto gekauft. If the gender and case labels feel shaky, that is the real prerequisite here — our guide to der, die, das and the four German cases explained are the two pieces this flowchart assumes you already have.

Strong — when nothing else shows it

Drop the article entirely and the adjective has no backup. Nothing is signaling gender or case, so the adjective copies the der/die/das ending onto itself. That is exactly why these endings look almost identical to the definite article.

Case	Masculine	Feminine	Neuter	Plural
Nominative	guter Wein	gute Milch	gutes Brot	gute Weine
Accusative	guten Wein	gute Milch	gutes Brot	gute Weine
Dative	gutem Wein	guter Milch	gutem Brot	guten Weinen
Genitive	guten Weines	guter Milch	guten Brotes	guter Weine

So Tiere fressen rohes Fleisch (raw meat) and Ich trinke Kaffee mit kalter Milch (cold milk). The one quirk: masculine and neuter genitive singular take -en, not the -es you would expect — guten Weines. The noun itself already shows genitive with its own -s (Wein → Weines), so the marker is not needed twice. It is rare and barely spoken, so note it and move on.

Mixed — ein and the three gaps

After ein, kein, and possessives (mein, dein, sein, ihr, unser, euer), the pattern is “weak with three patches.” The word ein has no ending in exactly three spots, so it cannot reveal gender there — and the adjective steps in with the strong der/die/das ending. Everywhere else ein does carry an ending (einen, einem, einer, eines), so the adjective relaxes back to weak.

Case	Masculine	Feminine	Neuter	Plural (meine)
Nominative	ein guter Mann ◀	eine gute Frau	ein gutes Kind ◀	meine guten Kinder
Accusative	einen guten Mann	eine gute Frau	ein gutes Kind ◀	meine guten Kinder
Dative	einem guten Mann	einer guten Frau	einem guten Kind	meinen guten Kindern
Genitive	eines guten Mannes	einer guten Frau	eines guten Kindes	meiner guten Kinder

The three ◀ cells — nominative masculine -er, nominative neuter -es, accusative neuter -es — are the only differences from the weak table. This is the source of the most famous trap in German: ein alter Mann sitzt dort (an old man sits there), never ein alte Mann, because ein alone does not tell you masculine versus neuter. And remember ein has no plural — meine/keine plus a plural noun is always -en, just like weak.

Edge cases in 60 seconds

A few adjectives change their stem when an ending is added: hoch becomes hoh- (ein hohes Haus), dunkel becomes dunkl- (ein dunkler Raum), and teuer becomes teur- (ein teures Auto). A handful never change at all — borrowed colours ending in -a like rosa, lila, orange (ein rosa Kleid, a pink dress); you can see more of these in our German colours vocabulary guide. After etwas, nichts, viel, and wenig, treat it as “no article,” use the strong neuter ending, and capitalize the adjective as a noun: etwas Schönes (something beautiful), nichts Neues (nothing new). Finally, two adjectives in a row take the same ending: der gute, alte Wein.

You now have the one question that does the work of three tables. Next time an adjective sits before a noun, do not reach for a grid — just ask whether the article already shows it, and let the answer tell you whether to stay lazy or step up. Try building a few phrases with words like neu and schön today, and the pattern will start to feel automatic faster than you expect.