caveman
/ˈkeɪvmæn/noun
(pl. -men /-men/)
1- a prehistoric man who lived in caves史前穴居野人。
1.1
- a man whose behaviour is uncivilized or violent行为不文明（或有暴力倾向）的男子：
as modifier you can't change my mind by caveman tactics.你不能用野蛮手段来改变我的看法。