in·sur·gent / inˈsərjənt/ • adj. rising in active revolt: alleged links with insurgent groups. . ∎  of or relating to rebels: a series of insurgent attacks.• n. (usu. insurgents) a rebel or revolutionary: an attack by armed insurgents.DERIVATIVES: in·sur·gence n.in·sur·gen·cy n. (pl. -cies) .

insurgent one who rises in active revolt. XVIII. — F. †insurgent — L. insurgēns, -ent-, prp. of insurgere rise up; see IN-1, SURGE, -ENT.
So insurrection XV. — (O)F. — late L., f. insurrect-, pp. stem of insurgere.