Where does “megalomaniacism” come from?

megalomaniacism (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.

megalomaniacism (English): megalomania

Definitions

  1. megalomania

Ancestry of “megalomaniacism”, step by step

megalomaniacism 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 megalomaniac

StepLanguageWordMeaning
1EnglishmegalomaniacOne affected with or exhibiting megalomania
Every word from Proto-Indo-European -mósEvery word from English -ismEvery word from English ism