-er der
Koffer
Usually 81.3% of the 2,315 common nouns ending in -er take der.
Many -er nouns are masculine, most of all people and machines that do something: der Lehrer, der Computer.
Exceptions die Mutter, die Tochter, die Schwester, das Wasser
der Koffer
It's der Koffer. Koffer is masculine, plural die Koffer.
Mein Koffer ist schwer.
My suitcase is heavy.
Koffer
Usually 81.3% of the 2,315 common nouns ending in -er take der.
Many -er nouns are masculine, most of all people and machines that do something: der Lehrer, der Computer.
Exceptions die Mutter, die Tochter, die Schwester, das Wasser