形容詞 treacherous:

1. dangerously unstable and unpredictable
   同義詞：unreliable
2. tending to betray; especially having a treacherous character as attributed to the Carthaginians by the Romans
   同義詞：punic, perfidious

1. He is treacherous to his friends.
   他對他的朋友不忠。
2. You treacherous cur!
   你這個背信棄義的家伙！
3. He thinks that she is his friend, but she is treacherous.
   他認(rèn)為她是他的朋友，但她是個奸詐的人。
4. My memory is treacherous.
   我的記憶靠不住。