Declension of the word "isthmus"

Singular and plural for Isthmus, m, weak declension     translation to English isthmus

Singular
Plural
Singular
Nominativ (Wer? Was?)
der Isthmus
die Isthmen
Genitiv (Wessen?)
des Isthmus
der Isthmen
Dativ (Wem?)
dem Isthmus
den Isthmen
Akkusativ (Wen? Was?)
den Isthmus
die Isthmen
Plural
die Isthmen
der Isthmen
den Isthmen
die Isthmen
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