Where does “showmanism” come from?

showmanism (English) comes from English ism, from English -ism, from Latin -ismus, from Ancient Greek -ισμός, from Ancient Greek -μός, from Proto-Indo-European -mós — Creates action/result nouns from verb stems.

Ancestry of “showmanism”, step by step

showmanism traces back through two separate lines of ancestry.

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

via English showman

StepLanguageWordMeaning
1EnglishshowmanA person who produces or presents shows as a...
2EnglishshowTo display, to have somebody see; To bestow; to...
3Middle Englishschewento show
4Old Englishscēawianto look, look at, exhibit, display; to look at,...
5Proto-Germanicskawwōnąto look, see, watch
6Proto-Indo-European(s)kewh₁-to perceive; to observe
Every word from Proto-Indo-European -mós