guard

defend, protect, safeguard, guard, shield, shelter, harbour

名词 guard:

1. a person who keeps watch over something or someone
2. the person who plays that position on a football team
3. a device designed to prevent injury
   同义词：safety, safety device
4. a posture of defence in boxing or fencing
5. the person who plays the position of guard on a basketball team
6. a group of men who escort and protect some important person
   同义词：bodyguard
7. a precautionary measure warding off impending danger or damage or injury etc.
   同义词：precaution, safeguard
8. the duty of serving as a sentry
   同义词：guard duty, sentry duty, sentry go
9. a position on the line of scrimmage
10. a position on a basketball team

动词 guard:

1. to keep watch over
2. watch over or shield from danger or harm; protect
   同义词：ward
3. protect against a challenge or attack
   同义词：defend, hold
4. take precautions in order to avoid some unwanted consequence

1. He bribed his way past the guard and escaped.
   他买通看守而逃之夭夭了。
2. Be on guard when somebody flatters you.
   有人奉承你时，一定要当心。
3. There are soldiers on guard at the gate.
   大门口有士兵在守卫。
4. The dog guarded the house against strangers.
   狗守卫着房屋，不让陌生人进去。

guard

v.（动词）
guard.ed,guard.ing,guards
v.tr.（及物动词）
To protect from harm by or as if by watching over:
保卫，守护：通过看守或似乎通过看守而保卫…免遭伤害：
例句：
guard a bank; guarding the President.See Synonyms at defend
守卫一个银行；护卫总统参见 defend

To watch over so as to prevent escape or violence:
看守：看守以阻止逃脱或暴力：
例句：
guarded the prisoner.
看守犯人

Sports To keep (an opposing player) from scoring or playing efficiently.
【体育运动】 防守：使（对方运动员）不能得分或有效进行比赛
To maintain control over, as to prevent indiscretion:
谨慎使用：对…保持控制以防不慎：
例句：
Guard what you say.
说话时要谨慎

To supervise entry or exit through; keep watch at:
监视：监督某处的出入；监视：
例句：
guarded the door.
监视门口

To furnish (a device or object) with a protective piece.
加防护装置：给（器械或物品）装防护装置
Archaic To escort.
【古语】 护送
v.intr.（不及物动词）
To take precautions:
警惕：采取预防措施：
例句：
guard against infection.
预防传染

To serve as a guard.
警卫：作为警卫
n.（名词）
One who protects, keeps watch, or acts as a sentinel.
警卫：象哨兵一样工作的人，守护，看守的人
One who supervises prisoners.
狱吏，看守：监管犯人的人
A group of people serving as an escort or performing drill exhibitions on ceremonial occasions:
护卫队：作为护卫或在庆典中走阅兵式的一群人：
例句：
an honor guard.
一个仪仗队

Chiefly British A railway employee in charge of a train.
【多用于英国】 火车列车员：管理火车的铁路职员
Football One of the two offensive linemen on either side of the center.
【橄榄球】 侧卫：中线两侧的两进攻队员之一
Basketball Either of the two players normally positioned in the backcourt who are responsible for bringing the ball to and initiating offensive plays from the frontcourt.
【篮球】 后卫：通常位于后场的两队员之一，负责传球和从前场组织进攻
Sports A defensive position or stance, as in boxing or fencing.
【体育运动】 防卫：在拳击或击剑中所处的防守的位置或姿势

The act or duty of guarding.
防守：防守的行为或职责
Protection; watch:
保护；监视：
例句：
a prisoner under close guard.
受严密监视的犯人

Something that gives protection; a safeguard:
防卫物：进行保护的东西；保护物：
例句：
a guard against tooth decay.
防止虫牙的东西

A device or an attachment that prevents injury, damage, or loss, especially:
防护装置：防止伤害，损害或损失的装置或附加装置，尤其是：
An attachment or a covering put on a machine to protect the operator or a part of the machine.
外壳：机器上的附加装置或外罩，用以保护操作者或机器的某一部分
A device on a foil, sword, or knife that protects the hand.
护手：钝头剑、剑或刀上的保护手的装置
A padded covering worn to protect a body part from injury:
护身物：保护身体部分免受伤害的衬垫：
例句：
a shin guard.
护胫

A small chain or band attached to a watch or bracelet to prevent loss.
链，带：系在表或手镯上以防其丢失的小链子或带子
A ring worn to prevent a more valuable ring from sliding off the finger.
户戒：为防止贵重的戒指滑脱而另戴的戒环
Electronics A signal that prevents accidental activation of a device or ambiguous interpretation of data.
【电子学】 信号：为防止装置意外激活或对数据含混解释的信号

<习惯用语>off (one`s) guard
Not alert; unprepared.
不警觉的；未准备的
on (one`s) guard
Alert and watchful; cautious.
谨慎的：警觉且戒备的；谨慎的
stand guard
To keep watch.
监视，守望
To act as a sentinel.
担当哨兵的工作
来源：
Middle English garden
中古英语 garden
from Old French garder, guarder
源自 古法语 garder, guarder
[of Germanic origin] * see wer- 3
[源自日尔曼语] *参见 wer- 3

【引伸】
guard.er
n.（名词）