Where does “Mithraism” come from?

Mithraism (English) comes from French mithriacisme, from French -ïsme, from Latin -isma, from Latin -ismus, from Ancient Greek -ισμός, from Ancient Greek -μός, from Proto-Indo-European -mós — Creates action/result nouns from verb stems.

Mithraism (English): An astrology-based, middle-platonic mystery religion of the 1st-4th century Roman Empire that claimed to have been founded by Zoroaster, admitted only men, and was especially popular among the Roman military

Definitions

  1. An astrology-based, middle-platonic mystery religion of the 1st-4th century Roman Empire that claimed to have been founded by Zoroaster, admitted only men, and was especially popular among the Roman military

Ancestry of “Mithraism”, step by step

StepLanguageWordMeaning
1FrenchmithriacismeMithraism
2French-ïsme-ism, variant of -isme following vowels
3Latin-ismaAlternative form of -ismus; -ism
4Latin-ismus-ism
5Ancient Greek-ισμόςForms abstract nouns
6Ancient Greek-μόςForms abstract nouns
7Proto-Indo-European-mósCreates action/result nouns from verb stems
Every word from Proto-Indo-European -mósEvery word from French -ïsmeEvery word from Ancient Greek -μός