Definition from Wiktionary, the free dictionary
See also pysty
Usage notes 
- This is actually an adjective, but it is never declined in the positive degree and it is always prefixed to a noun. Instead, the comparative degree pystympi and the superlative degree pystyin can be used alone and can be declined.
- The cases of pysty- serve in Finnish only as adverbs.
Declension of pysty-