Where does “мышьяковистый” come from?

мышьяковистый (Russian) comes from Russian мышьяко́вый, from Russian -о́вый, from Old East Slavic -овъ, from Proto-Slavic -ovъ — of, belonging to.

мышьяковистый (Russian): arsenous, arsenious

Definitions

  1. arsenous, arsenious

Ancestry of “мышьяковистый”, step by step

StepLanguageWordMeaning
1Russianмышьяко́выйarsenic
2Russian-о́выйused to form adjectives from nouns, often
3Old East Slavic-овъ—
4Proto-Slavic-ovъof, belonging to
Every word from Proto-Slavic -ovъ →Every word from Russian -о́вый →Every word from Old East Slavic -овъ →