Where does “antibolshevism” come from?
antibolshevism (English) comes from English bolshevism, from Russian большеви́зм, from Russian большинство́, from Russian большо́й, from Russian бо́льший, from Proto-Slavic *boľьjь, from Proto-Slavic slàva, from Proto-Indo-European ḱlew- — to cover; to incline.
antibolshevism (English): Opposition to Bolshevism
Ancestry of “antibolshevism”, step by step