n.

1. 哨兵；衛兵；警備員；看守員[C]
   A guard was placed at the door.

   門口設了一個警衛。

2. 護衛隊[the S][G]
   A heavy guard remained around the building.

   建築物周圍一直有重兵守衛。

3. （常大寫）（英國等的）皇家禁衛軍[the P][G]
4. 守衛；警戒；看守[U]
   A policeman kept guard over the prisoners.

   一名警察看守囚犯。

5. 防護物[C]
6. 【英】（火車的）列車長[C]
7. （拳擊等的）防禦姿勢，防守[U]
8. 【籃】後衛

vt.

1. 保衛；守衛；警衛[（+against/from）]
   A helmet guards your head against/from injuries.

   頭盔可以保護你的頭部免受傷害。

   A dog guarded his house.

   一隻狗守衛著他的房子。

2. 看守；監視
3. 控制；使（言詞等）謹慎
   You must guard your tongue carefully.

   你說話必須小心謹慎。

vi.

1. 防範；警惕[（+against）]
   You should wash your hands before eating, to guard against disease.

   你飯前應洗手，以防生病。

2. 守衛；看守

v.

1. watch over in order to protect, control, or restrict.
   ▸Basketball  stay close to (an opponent) to prevent them getting or passing the ball.
2. prevent from being harmed.
   ▸ (guard against) take precautions against.

n.

1. a person, especially a soldier, who guards or keeps watch.
   ▸N. Amer. a prison warder.
2. [treated as sing. or pl.] a body of soldiers serving to protect a place or person.
   ▸ (Guards) the household troops of the British army.
3. a device worn or fitted to prevent injury or damage.
4. a defensive posture adopted in a fight.
   ▸vigilance against adverse circumstances:

   he let his guard slip.
5. Brit. an official who rides on and is in general charge of a train.
6. Basketball  each of two players chiefly responsible for marking opposing players.
7. American Football  each of two players either side of the centre.

[名]

1. ①守衛。
2. ②籃球後衛。
   그는 한국 농구선수 중에서 가장 뛰어난 가드이다.

   他是韓國籃球選手中最出色的後衛。