A reactionary person or group tries to prevent changes in the political or social system of their country.
例句
It grew ever more clear to everyone that the Minister was too reactionary, too blinkered...大家都越來越清楚部長太保守、心胸太狹窄。As long as I have strength, I shall be trying to remove the reactionary forces from the party.只要我還有精力，我就要盡量清除黨內反動勢力。