rebel

Concise Oxford English Dictionary © 2008 Oxford University Press:
rebel

▶noun /ˈrɛb(ə)l/ a person who rebels. ▶verb /rɪˈbɛl/ (rebels, rebelling, rebelled) rise in opposition or armed resistance to an established government or ruler.

■ resist authority, control, or convention.

■ show or feel resistance or repugnance.

– origin ME (orig. referring to a fresh declaration of war by the defeated): from OFr. rebelle (n.), rebeller (v.), from L. rebellis, based on bellum ‘war’.