zealot |ˈzelət|
noun
a person who is fanatical and uncompromising in pursuit of their religious, political, or other ideals.
• ( Zealot) historical a member of an ancient Jewish sect aiming at a world Jewish theocracy and resisting the Romans until ad 70.
DERIVATIVES
zealotry |-ətrē| |ˈzɛlətri| noun
ORIGIN mid 16th cent. (in the sense [member of an ancient Jewish sect] ): via ecclesiastical Latin from Greek zēlōtēs, from zēloun ‘be jealous,’ from zēlos (see zeal ).