treachery/ ˈtreʧərɪ /

1.noun[u] 

背叛,不忠

I can't stand your treachery and lies!
我不能忍受你的背叛和谎言!
2.noun[c] 

背叛行为,背信弃义的举动

His treachery was motivated by a number of reasons.
多种原因引发了他的背信弃义。