Where does “начищать” come from?
начищать (Russian) comes from Russian начи́стить, from Russian чи́стить, from Proto-Slavic čistiti, from Proto-Slavic čistъ, from Proto-Balto-Slavic skīstas, from Proto-Indo-European skidtos, from Proto-Indo-European (s)keyd-.
начищать (Russian): to polish, to shine
Ancestry of “начищать”, step by step