Where does “Romanism” come from?

Romanism comes from English Roman plus the suffix -ism, from Ancient Greek -ισμός, ultimately deriving from Latin romanus meaning "of Rome" through the Proto-Italic suffix -os.

Romanism (English): The tenets of the Church of Rome; the Roman...

Definitions

  1. The tenets of the Church of Rome; the Roman...

Ancestry of “Romanism”, step by step

Romanism traces back through two separate lines of ancestry.

via Romanian român

StepLanguageWordMeaning
1RomanianromânRomanian; Romanian man
2FrenchromanRomance; romanesque; A novel
3Old FrenchromanzOld French; a story in Old French; account
4Latinrōmānicēin the Roman manner
5Latinly; used to form adverbs from adjectives
6Latindis-asunder, apart, in two; reversal, removal;...
7Latincalceusshoe
8Latincalxlimestone; chalk; the finish line
9Ancient Greekχάλιξsmall stone, pebble; gravel, rubble

via English roman

StepLanguageWordMeaning
1Englishromanupright, as opposed to italic; of or related to...
2Old FrenchRomainRoman
Every word from Ancient Greek χάλιξ