Breakdown of Gefiltertes Wasser schmeckt mir besser als Leitungswasser.
Questions & Answers about Gefiltertes Wasser schmeckt mir besser als Leitungswasser.
It’s capitalized only because it is the first word of the sentence. Normally it would be written gefiltertes Wasser (lowercase g), since gefiltert is an adjective/participle.
The ending -es comes from adjective declension:
- gefiltert (from the verb filtern) is used like an adjective in front of Wasser.
- Wasser is neuter, singular, and here it is the subject → nominative.
- There is no article (das, ein, dieses, etc.) before it.
With no article before a neuter noun in the nominative singular, an attributive adjective takes the strong ending -es:
- gefiltertes Wasser – filtered water (nominative/accusative, no article)
Compare:
- das gefilterte Wasser – the filtered water
- mit gefiltertem Wasser – with filtered water (dative)
- kein gefiltertes Wasser – no filtered water
So: Gefiltertes = capitalized because of sentence position, -es because of strong adjective ending before neuter Wasser.