Where does “sillyism” come from?

sillyism (English) comes from English silly, from Middle English seely, from Old English sǣliġ, from Proto-West Germanic sālīg, from Proto-West Germanic -g, from Proto-Germanic -gaz, from Proto-Indo-European -ḱos — -y, -ic.

sillyism (English): silliness

Definitions

  1. silliness

Ancestry of “sillyism”, step by step

sillyism traces back through two separate lines of ancestry.

via English silly

StepLanguageWordMeaning
1EnglishsillyLaughable or amusing through foolishness or a...
2Middle Englishseelyhappy
3Old Englishsǣliġblessed, fortunate; happy, prosperous, blessed
4Proto-West Germanicsālīgblissful, prosperous, happy
5Proto-West Germanic-gForms adjectives from nouns and verbs with a...
6Proto-Germanic-gaz-y
7Proto-Indo-European-ḱos-y, -ic

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
Every word from Proto-Indo-European -ḱos