extremely cruel and making you feel shocked 殘酷的；極其殘忍的 the barbarous treatment of these prisoners of war 對這些戰犯的殘酷待遇
showing a lack of education and good manners 缺乏教養的；粗野的
Word Originlate Middle English ((in sense 2)): via Latin from Greek barbaros ‘foreign’ + -ous.