dissident
adj.
1530s, from Latin dissidentem (nominative dissidens), present participle of dissidere "to be remote; disagree, be removed from," literally "to sit apart," from dis- "apart" (see dis-) + sedere "to sit" (see sedentary).
n.
1766, in reference to Protestants, from dissident, adj.. In the political sense first used 1940, coinciding with the rise of 20c. totalitarian systems, especially with reference to the Soviet Union.
〔蒋〕[sid=sit坐，-ent表示人] 不同意的人，持异议的
〔李〕[dis-=apart分开；sid=to sit坐；-ent n.=person人→“person who sits apart from others 与别人分开坐的人”→] n. person openly disagreeing with an opinion; dissenter 持异议者；反对者