English
illegalism
From illegal + -ism.
Formed from illegal + -ism
Proto-Italic *lēks ‘law’
Latin lēx ‘law’
Latin lēgālis ‘legal’
Medieval Latin illegalis
French illégal ‘illegal’
English illegal
Today it means
noun Illegal activity, especially seen as systemic or as part of a general philosophy or ideology.
Language periods are conventional ranges, not dates for this word.
Etymograph / illegalism