Terror (from French terreur, from Latin terror "great fear", terrere "to frighten"[1][2]) is a policy of political repression and violence intended to subdue political opposition. The term first appears in the Reign of Terror, a revolutionary violence during the French Revolution,[2][3] which also gave rise to the term terrorism.[4]
Before the late twentieth century, the term "terrorism" in the English language was often used interchangeably with "terror". The term "terrorism" frequently refers to acts by groups with a limited political base or parties on the weaker side in asymmetric warfare, while "terror" refers to acts by governments.
Finally, the word terrorist. It is rooted in the Latin terrere, "to frighten," and the -ist was coined in France to castigate the perpetrators of the Reign of Terror.