sap

1. V-T If something saps your strength or confidence, it gradually weakens or destroys it. 消耗; 削弱

I was afraid the sickness had sapped my strength. 恐怕这场病已经消耗了我的力气。

2. V-T to undermine (a fortification, etc) by digging saps 挖地道以摧毁(工事等)

3. N-UNCOUNT Sap is the watery liquid in plants and trees. (植物的) 汁液

The leaves, bark and sap are also common ingredients of local herbal remedies. 树叶、树皮和树液也是当地草药疗法的常用药材。

4. N-COUNT a gullible or foolish person 容易上当的人[slang]

5. N-COUNT energy; vigour 精力

6. N-COUNT a deep and narrow trench used to approach or undermine an enemy position, esp in siege warfare 地道