gläsernen

Gläsernen is the inflected form of the German adjective gläsern, meaning "made of glass" or "glass-like." It functions as a descriptive modifier and is not a standalone noun. The form gläsernen appears in various grammatical cases and genders when the adjective follows a definite determiner (such as der, die, das, die) or a similar word that triggers the weak declension.

In the weak declension after definite articles, gläsernen appears in several common forms:

- Masculine singular: der gläserne Turm (nominative); den gläsernen Turm (accusative); dem gläsernen Turm (dative); des gläsernen Turmes (genitive)

- Feminine singular: die gläserne Tür (nominative/accusative); der gläsernen Tür (dative/genitive)

- Neuter singular: das gläserne Fenster (nominative/accusative); des gläsernen Fensters (genitive)

- Plural: die gläsernen Fenster (nominative/accusative); den gläsernen Fenstern (dative); der gläsernen Fenster (genitive)

These endings reflect standard German adjective declension after a definite determiner. The corresponding mixed declension occurs with certain determiners (for example, ein). The base form gläsern is derived from Glas (glass) and retains its sense of transparency or fragility in both literal and figurative uses.

Usage notes and examples:

- Die gläserne Tür wirkt lichtdurchlässig.

- Den gläsernen Turm betrachteten die Besucher lange.

- Des gläsernen Fensters Riss verriet eine Kälte.

As a literary or descriptive device, gläsern and its inflected forms are common in descriptions of architecture, vessels, or anything emphasizing transparency, fragility, or clarity.