Where does “маховый” come from?

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

Ancestry of “маховый”, step by step

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