Why does the noun Unterarm have the article der?

This noun follows no general suffix rule — its gender is part of the core vocabulary you simply learn alongside the word.

Declension table for German noun Unterarm

How it changes across the four cases.

CaseDefiniteIndefiniteNegative
Nominativder Unterarmein Unterarmkein Unterarm
Akkusativden Unterarmeinen Unterarmkeinen Unterarm
Dativdem Unterarmeinem Unterarmkeinem Unterarm
Genitivdes Unterarmseines Unterarmskeines Unterarms

Examples in context

Real sentences using Unterarm in different cases.

CaseDefiniteIndefiniteNegative
Nominativ
Der lange Unterarm ist lang.The long forearm is long.
Ein Unterarm ist oft behaart.A forearm is often hairy.
Kein Unterarm ist kurz.No forearm is short.
Akkusativ
Ich sehe den langen Unterarm.I see the long forearm.
Er hat einen Unterarm gebrochen.He broke a forearm.
Ich habe keinen Unterarm berührt.I haven't touched any forearm.
Dativ
Ich helfe dem langen Unterarm.I help the long forearm.
Er gibt einem Unterarm eine Spritze.He gives a forearm an injection.
Ich helfe keinem Unterarm bei der Arbeit.I don't help any forearm with work.
Genitiv
Die Länge des langen Unterarms.The length of the long forearm.
Die Länge eines Unterarms ist variabel.The length of a forearm is variable.
Die Länge keines Unterarms ist fix.The length of no forearm is fixed.

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Frequently asked questions

Everything you might wonder about der, die, das — and the Der Artikel app.

Is it der, die, or das Unterarm?

It is der Unterarm. In German, every noun has a grammatical gender, and Unterarm is masculine. You should always learn the article together with the noun to ensure your German grammar is correct.

What is the plural of der Unterarm?

The plural form of der Unterarm is die Unterarme. In German, regardless of the singular gender, all plural nouns use the definite article “die.”

What does der Unterarm mean in English?

The German word der Unterarm translates to “forearm” in English.

How do you decline der Unterarm?

Like all German nouns, Unterarm changes its article depending on the case. In the singular, the forms are:
  • Nominativ: der Unterarm
  • Akkusativ: den Unterarm
  • Dativ: dem Unterarm
  • Genitiv: des Unterarms

These changes are necessary because German uses cases to indicate the noun’s role in a sentence (such as the subject or object). Knowing these forms allows you to build grammatically correct sentences.