反 - anti-

anti-establishment

reactionary fall (e.g. in stock prices)

echo; reverberation

proof to the contrary; disproof; counter-evidence; rebuttal; refutation

anti-American

while; although; though; but

anti-

antipathy; antagonism; animosity; revulsion; ill feeling

reaction

reflection; reverberation

anti-war

objection; refutation; rebuttal; counterargument