Where does “matrilinearism” come from?

matrilinearism (English) comes from English matrilinear, from English linear, from Latin linearis, from Latin līnea, from Latin līnum, from Proto-Italic līnom, from Proto-Indo-European līnom — flax.

Ancestry of “matrilinearism”, step by step

matrilinearism traces back through two separate lines of ancestry.

via English matrilinear

StepLanguageWordMeaning
1Englishmatrilinear
2EnglishlinearHaving the form of a line; straight or roughly...
3Latinlinearisconsisting of lines, linear, lineal;...
4LatinlīneaA linen thread
5Latinlīnumflax
6Proto-Italiclīnom
7Proto-Indo-Europeanlīnomflax

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 līnomEvery word from Proto-Italic līnomEvery word from Latin līnum