Where does “楽観主義” come from?

楽観主義 (Japanese) comes from Japanese 主義, 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.

楽観主義 (Japanese): optimism

Definitions

  1. optimism

Ancestry of “楽観主義”, step by step

楽観主義 traces back through two separate lines of ancestry.

via Japanese 主義

StepLanguageWordMeaning
1Japanese主義a principle or set of principles; a doctrine; an...
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 Japanese 楽観

StepLanguageWordMeaning
1Japanese楽観optimism; be optimistic, look on the bright side
Every word from Proto-Indo-European -mósEvery word from English -ismEvery word from Ancient Greek -μός