n.

1. （樹等的）液，汁[U]
   The weather was warming up and the sap was rising in the maples.

   天氣在轉暖，槭樹的樹液在上升。

2. 精力，元氣[U]
   The world's whole sap is sunk.

   整個世界元氣大喪。

3. （樹皮和心材之間的）邊材[U]
4. 【美】【口】笨蛋[C]
   You don't know what a sap she is.

   你不知道她有多笨。

   Don't you know I was kidding, you sap?

   笨蛋，你不知道我是在開玩笑嗎？

5. 【美】（中間灌鉛的）橡皮棍[C]

vt.

1. 使大傷元氣
   The long walk sapped the old lady's strength.

   長途跋涉耗盡了老太太的體力。

2. 使乾枯

vt.

1. 在……下挖掘；破壞……的基礎
   The houses were sapped by floods.

   這些房屋被洪水毀壞。

2. 在……下挖掘坑道
3. 削弱，逐漸消耗
   The intense heat sapped her strength.

   酷暑消耗了她的體力。

vi.

1. 挖掘坑道
2. 挖坑道靠近敵方

n.

1. 坑道；（坑道的）挖掘[C][U]
   They pushed forward saps into No Man's Land.

   他們把坑道向無人地帶推進。

2. 削弱，破壞

n.

1. the fluid, chiefly water with dissolved sugars and mineral salts, circulating in the vascular system of a plant.
2. vigour or energy.

v.

n.

v.

1. historical dig a sap.
2. archaic make insecure by removing the foundations.
3. [often as noun sapping] Geography  undercut by water or glacial action.

n.

n.

v.