die · Feminine (Femininum)B2Feminine DeclensionWork & Bureaucracy

die Effizienz

efficiency

Nominative Sg.die Effizienz

Genitive Sg.der Effizienz

Nominative Plural

Singular only

Dative Plural—

Gender / Plural CueSuffix -enz -> ALWAYS feminine (die)

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?	die Effizienz	— (singular only)
Accusative Akkusativ (Wenfall)	Wen oder was?	die Effizienz	— (singular only)
Dative Dativ (Wemfall)	Wem?	der Effizienz	— (singular only)
Genitive Genitiv (Wesfall)	Wessen?	der Effizienz	— (singular only)

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?	eine Effizienz	— (singular only)
Accusative Akkusativ (Wenfall)	Wen oder was?	eine Effizienz	— (singular only)
Dative Dativ (Wemfall)	Wem?	einer Effizienz	— (singular only)
Genitive Genitiv (Wesfall)	Wessen?	einer Effizienz	— (singular only)

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?	keine Effizienz	— (singular only)
Accusative Akkusativ (Wenfall)	Wen oder was?	keine Effizienz	— (singular only)
Dative Dativ (Wemfall)	Wem?	keiner Effizienz	— (singular only)
Genitive Genitiv (Wesfall)	Wessen?	keiner Effizienz	— (singular only)

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?	meine Effizienz	— (singular only)
Accusative Akkusativ (Wenfall)	Wen oder was?	meine Effizienz	— (singular only)
Dative Dativ (Wemfall)	Wem?	meiner Effizienz	— (singular only)
Genitive Genitiv (Wesfall)	Wessen?	meiner Effizienz	— (singular only)

Why These Endings Work

All feminine (die) nouns stay completely unchanged in the singular across Nominative, Accusative, Dative, and Genitive.

Feminine nouns never change their own ending in the singular across all four cases.
Uncountable / singular-only noun in standard usage (no common plural table).

Pattern summary: Only the article changes in singular (die / die / der / der); plural takes -n in Dative unless ending in -n or -s.

Example Sentences in Context

Nominative

Die neue Anlage steigert die Effizienz deutlich.

The new plant increases efficiency considerably.

Genitive

Zur Verbesserung der Effizienz arbeiten wir mit neuer Software.

To improve efficiency, we're working with new software.

Interactive Tools & Related Guides

Check "Effizienz" 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 Noun Plurals & Dative -nPlural patterns and the Dative plural -n rule Dative Case GuideIndirect objects, prepositions, and der + feminine nouns

FAQs: die Effizienz

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

"Effizienz" takes the feminine definite article "die" (die Effizienz). Gender cue: Suffix -enz -> ALWAYS feminine (die).

What is the plural and Dative plural of "die Effizienz"?

"die Effizienz" is normally uncountable (singular-only) in standard German and does not form a common plural table.

How does "die Effizienz" change in the Genitive, Accusative, and Dative?

As a feminine noun, "Effizienz" keeps the exact same stem in all four singular cases; only the article changes (die Effizienz / die Effizienz / der Effizienz / der Effizienz).