Where does “вычищать” come from?
вычищать (Russian) comes from Russian вы́чистить, 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-.
вычищать (Russian): to clean
Ancestry of “вычищать”, step by step