User:Mistrz/przeciwsłonecznie
Regular adverb from przeciwsłoneczny.
Easily attestable through google, but websites aren't "durably archived"…
Not attestable through National Corpus of Polish(nkjp.pl) and Usenet has only one citation:
- Lua error in Module:parameters at line 828: Parameter 2 is not used by this template.
Maybe later something will come up.