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...大家都越来越清楚部长太保守、心胸太狭窄。As long as I have strength, I shall be trying to remove the reactionary forces from the party.只要我还有精力,我就要尽量清除党内反动势力。