Where does “filibusterism” come from?

filibusterism (English) comes from English filibuster, from Spanish filibustero, from French flibustier, from Dutch vrijbuiter, from Dutch -er, from Old Dutch -āri, from Proto-Germanic -ārijaz, from Latin -ārius — Forms relational adjectives to nouns (and rarely numerals).

filibusterism (English): Piracy, freebooting; the waging of unauthorised...

Definitions

  1. Piracy, freebooting; the waging of unauthorised...

Ancestry of “filibusterism”, step by step

filibusterism traces back through two separate lines of ancestry.

via English filibuster

StepLanguageWordMeaning
1EnglishfilibusterA mercenary soldier; a freebooter;...
2Spanishfilibusteropirate, plunderer, freebooter
3FrenchflibustierA filibuster, a pirate
4DutchvrijbuiterA freebooter, particularly a pirate
5Dutch-erForms agent nouns from verbs; Forms nouns for a...
6Old Dutch-āri
7Proto-Germanic-ārijaz-er
8Latin-āriuser
9Proto-Italic*-āziosForms relational adjectives to nouns (and rarely numerals)

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-Italic *-āziosEvery word from Latin -āriusEvery word from Dutch -er