/
ˈzɛlət/
n.
  - a fanatical and uncompromising follower of a religion or policy.
- 
(Zealot)
 a member of an ancient Jewish sect aiming at a world Jewish theocracy and resisting the Romans until ad 70.
Derivative
Etymology
C16: via eccles. L. from Gk zēlōtēs, from zēloun ‘be jealous’, from zēlos (see zeal).