noun
window
A2
Fenster means 'window'. It's neuter (das Fenster) and most commonly plural unchanged as 'die Fenster'. Genitive singular forms 'des Fensters' add -s. No special prepositions or irregularities. Use regular declension patterns; dative plural takes -n: den Fenstern. Common collocations: das Fenster öffnen (to open the window).
Examples
Das Fenster ist offen.
The window is open.
Ich habe das Fenster geöffnet.
I opened the window.
Der Sturm stieß das Fenster ein, sodass das Zimmer nass wurde.
The storm smashed the window in, so the room became wet.
Details
Mnemonics
Imagine a rectangular 'fen'shaped frame with 'ster' (star) stickers on the glass.
Sounds like 'fen' + 'ster' — think of 'pane' (window pane).
das — remember 'das' for many neuter objects like 'das Fenster' (it feels like an object, not a person).
Notes
Common everyday noun. Plural identical to singular: die Fenster.