Where does “поганьство” come from?
поганьство (Old Church Slavonic) comes from Old Church Slavonic поганъ, from Latin pāgānus, from Latin pāgus, from Proto-Italic pāgos, from Proto-Indo-European peh₂ǵos, from Proto-Indo-European peh₂ǵ- — to attach.
поганьство (Old Church Slavonic): paganism
Ancestry of “поганьство”, step by step