Where does “Hussism” come from?

Hussism (English) comes from English Hus, from Dutch huis, from Dutch raad, from Middle Dutch râet, from Old Dutch rāt, from Proto-West Germanic rād, from Proto-Germanic rēdaz, from Proto-Indo-European Hréh₁dʰos — to fit, to fix, to put together.

Ancestry of “Hussism”, step by step

Hussism traces back through two separate lines of ancestry.

via English Hus

StepLanguageWordMeaning
1EnglishHusnotably borne by Jan Hus, a Czech religious reformer
2DutchhuisA house, home, residence; A genealogical house,...
3DutchraadAn advice, counsel; A council, board, body which...
4Middle Dutchrâet
5Old Dutchrāt
6Proto-West Germanicrādadvice, counsel
7Proto-Germanicrēdazadvice, counsel
8Proto-Indo-EuropeanHréh₁dʰos
9Proto-Indo-EuropeanHreh₁dʰ-to think; to arrange; to succeed, accomplish
10Proto-Indo-Europeanh₂reh₁-to think, reason; to arrange
11Proto-Indo-Europeanh₂er-to fit, to fix, to put together

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 h₂er-