Rioting comes from riot + -ing, from Old French riote ('dispute, quarrel'), of uncertain origin, possibly from Latin rugire ('to roar'). The historical chain includes Old French riote. Older glosses in the chain include "dispute, quarrel" and "to roar", which help explain the semantic range of the modern word. Morphologically, rioting is best read as compound, suffixal formation, borrowing, and uncertain formation, yielding an English noun and adjective shaped by both form history and later usage. In current English it functions as a noun and adjective, with the sense "violent public disorder by a crowd; engaging in such disorder". related forms include riot, riotous, and rioter. The result is an English noun and adjective whose etymology preserves the older forms while supporting the word's specialized modern meaning.