adj.背信棄義的；背叛的；不可靠的；危險的
He is treacherous to his friends. 他對他的朋友不忠。
My memory is treacherous. 我的記憶靠不住。
The road becomes treacherous when it is iced up. 道路結(jié)冰以后就很危險了。
adv.背叛地；靠不住地；危險地
n.背叛；奸詐
