oppressor
壓迫者,壓製者,暴君
Op·press·or n. One who oppresses; one who imposes unjust burdens on others; one who harasses others with unjust laws or unreasonable severity.
The orphan pines while the oppressor feeds. --Shak.
To relieve the oppressed and to punish the oppressor. --Swift.
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oppressor
n : a person of authority who subjects others to undue pressures