Where does “Hindooism” come from?

Hindooism (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.

Hindooism (English): Dated form of Hinduism

Definitions

  1. Dated form of Hinduism

Ancestry of “Hindooism”, step by step

Hindooism 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 Hindoo

StepLanguageWordMeaning
1EnglishHindooHindu; Hindu, Indian
Every word from Proto-Indo-European -mósEvery word from English -ismEvery word from English ism