形容词

1. 粗野的；未开化的；野蛮的
If you describe something as barbarous, you strongly disapprove of it because you think that it is rough and uncivilized.

2. 残暴的；极其残忍的；凶残的
If you describe something as barbarous, you strongly disapprove of it because you think that it is extremely cruel.

1. primitive in customs and culture

2. (of persons or their actions) able or disposed to inflict pain or suffering

e.g. a barbarous crime
brutal beatings
cruel tortures
Stalin's roughshod treatment of the kulaks
a savage slap
vicious kicks

Synonym: brutalcruelfellroughshodsavagevicious