Where does “latosiny” come from?

latosiny (Polish) comes from Polish -iny, from Old Polish -in, from Proto-Slavic -inъ, from Proto-Indo-European -iHnos, from Proto-Indo-European -no- — adjectival suffix.

Ancestry of “latosiny”, step by step

StepLanguageWordMeaning
1Polish-inyforms tantum plurale nouns usually associated with a day of celebration
2Old Polish-informs adjectives
3Proto-Slavic-inъ-ine; Creates singulatives, mostly with...
4Proto-Indo-European-iHnosCreates adjectives of materials
5Proto-Indo-European-no-adjectival suffix
Every word from Proto-Indo-European -no- →Every word from Polish -iny →Every word from Proto-Indo-European -iHnos →