Where does “мусорской” come from?

мусорской (Russian) comes from Russian -ско́й, from Proto-Slavic -ьskъ, from Proto-Indo-European -iskos — Characteristic of, typical of, pertaining to.

мусорской (Russian): cop (police officer)

Definitions

  1. cop (police officer)

Ancestry of “мусорской”, step by step

StepLanguageWordMeaning
1Russian-ско́йUsed to form adjectives from nouns, often: -ian, -ic, -ish
2Proto-Slavic-ьskъ-ic, -ish
3Proto-Indo-European-iskosCharacteristic of, typical of, pertaining to
Every word from Proto-Indo-European -iskos →Every word from Proto-Slavic -ьskъ →Every word from Russian -ско́й →