der · Masculine (Maskulinum)A2N-Declension / WeakPeople & Family

der Nachbar

neighbor

Nominative Sg.der Nachbar

Genitive Sg.des Nachbarn

Nominative Plural

die Nachbarn

Dative Pluralden Nachbarn

Gender / Plural CueMasculine weak noun (N-Deklination: den/dem/des Nachbarn)

Full 4-Case Declension Table

Switch determiner types to inspect how articles and noun endings change together.

Definite (der / die / das): Used for specific, already known, or general-category nouns.

Case (Fall)	Question	Singular	Plural
Nominative Nominativ (Werfall)	Wer oder was?	der Nachbar	die Nachbarn
Accusative Akkusativ (Wenfall)	Wen oder was?	den Nachbarn	die Nachbarn
Dative Dativ (Wemfall)	Wem?	dem Nachbarn	den Nachbarn
Genitive Genitiv (Wesfall)	Wessen?	des Nachbarn	der Nachbarn

Indefinite (ein / eine): Used when introducing a countable singular noun; has no plural article in German.

Case (Fall)	Question	Singular	Plural
Nominative Nominativ (Werfall)	Wer oder was?	ein Nachbar	Nachbarn
Accusative Akkusativ (Wenfall)	Wen oder was?	einen Nachbarn	Nachbarn
Dative Dativ (Wemfall)	Wem?	einem Nachbarn	Nachbarn
Genitive Genitiv (Wesfall)	Wessen?	eines Nachbarn	Nachbarn

Negative (kein / keine): Negates nouns with or without an indefinite article; follows ein-words in singular and die in plural.

Case (Fall)	Question	Singular	Plural
Nominative Nominativ (Werfall)	Wer oder was?	kein Nachbar	keine Nachbarn
Accusative Akkusativ (Wenfall)	Wen oder was?	keinen Nachbarn	keine Nachbarn
Dative Dativ (Wemfall)	Wem?	keinem Nachbarn	keinen Nachbarn
Genitive Genitiv (Wesfall)	Wessen?	keines Nachbarn	keiner Nachbarn

Possessive (mein / dein / …): Uses ein-word endings in singular and definite-like endings in plural (mein/dein/sein/ihr/unser/euer/Ihr).

Case (Fall)	Question	Singular	Plural
Nominative Nominativ (Werfall)	Wer oder was?	mein Nachbar	meine Nachbarn
Accusative Akkusativ (Wenfall)	Wen oder was?	meinen Nachbarn	meine Nachbarn
Dative Dativ (Wemfall)	Wem?	meinem Nachbarn	meinen Nachbarn
Genitive Genitiv (Wesfall)	Wessen?	meines Nachbarn	meiner Nachbarn

Why These Endings Work

Animate and classical masculine nouns ending in -e, -ent, -ant, -ist, -oge, plus key nouns like Herr and Mensch.

N-Declension (weak masculine): takes -(e)n in Accusative, Dative, and Genitive singular as well as plural.
Plural "Nachbarn" already ends in -n or -s, so Dative plural stays Nachbarn.

Pattern summary: Adds -n or -en in Accusative, Dative, and Genitive Singular (and Plural); Herr takes -n in Sg and -en in Pl.

Example Sentences in Context

Nominative

Unser Nachbar gießt im Urlaub unsere Blumen.

Our neighbor waters our flowers while we're on vacation.

Accusative

Ich frage den Nachbarn, ob er ein Paket für mich hat.

I ask the neighbor whether he has a parcel for me.

Interactive Tools & Related Guides

Check "Nachbar" in Der/Die/Das Checker Analyze in Compound Deconstructor Inspect Example in Sentence Analyzer

German Gender & ArticlesPredict der, die, das with high-frequency endings The Four German CasesNominative, Accusative, Dative, and Genitive roles N-Declension (Weak Nouns)Why "Nachbar" adds -(e)n across singular cases Genitive Case GuideHow "des Nachbarn" expresses possession

FAQs: der Nachbar

Is "Nachbar" der, die, or das in German?

"Nachbar" takes the masculine definite article "der" (der Nachbar). Gender cue: Masculine weak noun (N-Deklination: den/dem/des Nachbarn).

What is the plural and Dative plural of "der Nachbar"?

The Nominative plural of der Nachbar is "die Nachbarn" (pattern: -n). In the Dative plural it becomes "den Nachbarn".

How does "der Nachbar" change in the Genitive, Accusative, and Dative?

"Nachbar" follows N-Deklination (weak masculine): Nominative "der Nachbar", while Accusative "den Nachbarn", Dative "dem Nachbarn", and Genitive "des Nachbarn" all use "Nachbarn".