instigate

definition: 
provoke or stir up; serve as the inciting cause of
sentence: 
Relations between the two nuclear-armed neighbors have plummeted recently as each side accused the other of border violations and instigating terrorism.
Television has the power to instigate trends.
difficulty: 
easy
toefl frequency: 
2
toefl classification: 
adverb: 
instigatively
adjective: 
instigative
verb: 
instigate
verb sentence: 
In South Korea, during the 1970s and 80s, youth wearing jeans and playing guitar exploded cultural differences, instigated by economic growth.
noun: 
instigator
noun sentence: 
A police officer should not be the instigator of a crime.