Where does “clergyism” come from?

clergyism (English) comes from English clergy, from Middle English clergie, from Old French clergié, from Latin clēricātus, from Latin clēricus, from Ancient Greek κληρικός, from Ancient Greek -ικός, from Ancient Greek -κός — -y, -ic.

Ancestry of “clergyism”, step by step

clergyism traces back through two separate lines of ancestry.

via English clergy

StepLanguageWordMeaning
1EnglishclergyBody of persons, such as ministers, sheiks,...
2Middle Englishclergie
3Old Frenchclergiélearned men
4Latinclēricātus
5Latinclēricusa priest, clergyman or clergywoman, cleric
6Ancient Greekκληρικόςof or pertaining to clergy; clerical; clergyman
7Ancient Greek-ικόςof or pertaining to, in the manner of; -ic
8Ancient Greek-κόςforms adjectives with the sense of 'of or...
9Proto-Indo-European-ḱos-y, -ic

via English ism

StepLanguageWordMeaning
1EnglishismAn ideology, system of thought, or practice that...
2English-ismUsed to form nouns of action or process or result...
3Latin-ismus-ism
4Ancient Greek-ισμόςForms abstract nouns
5Ancient Greek-μόςForms abstract nouns
6Proto-Indo-European-mósCreates action/result nouns from verb stems
Every word from Proto-Indo-European -ḱosEvery word from Ancient Greek -ικόςEvery word from Ancient Greek -κός