sword

1. N-COUNT A sword is a weapon with a handle and a long sharp blade. 剑

2. PHRASE If you cross swords with someone, you disagree with them and argue with them about something. 争论

...a candidate who's crossed swords with labour by supporting the free-trade pact. …一位因支持自由贸易协定而与工党争论的候选人。

3. PHRASE If you say that something is a double-edged sword, you mean that it has negative effects as well as positive effects. 双刃剑

A person's looks are a double-edged sword. Sometimes it works in your favour, sometimes it works against you. 一个人的相貌是一把双刃剑。有时它对你有利，有时又对你不利。