ringleader

n (esp derog 尤作眨义) person who leads others in crime or opposition to authority 犯罪或叛乱活动的头目; 罪魁; 祸首; 元凶.

rigorous, rigorously, rigorousness, rigour (US rigor), rile, rim, rime, rimless, rind, ring, ring binder, ring mains, ring off, ring out, ring road, ring up, ring-finger, ring-pull, ring-shaped, ringer, ringlet, ringmaster, ringside, ringworm, rink, rinse, Rio de Janneiro, riot, riot police, riot shield, riotous, riotously, riotousness, rip, rip-cord, rip-off, rip-roaring, rip-saw, rip-tide, riparian,