1. 可数名词：哨兵；卫兵；警备员；看守员
2.护卫队
3.（常大写）（英国等的）皇家禁卫军
4. 不可数名词：守卫；警戒；看守
5. 可数名词：防护物
6. 可数名词：【英】（火车的）列车长
7. 不可数名词：（拳击等的）防御姿势，防守
v. 及物动词：
1.保卫；守卫；警卫( against/from)
2.看守；监视
3.控制；使（言词等）谨慎
v. 不及物动词：
1.防范；警惕( against)
2.守卫；看守
词形变化
- 名称 guarder
- 时态 guarded，guarding，guards
- 这些动词均有“保护、保卫”之意。
defend普通用词，指用武力或其它措施使人或物不受损害，消除危险。用作比喻时，指坚持某种行动、决定或意见。
protect普通用词，指用某种手段作为防御工具以防危险或伤害。
safeguard语气强，指采取积极措施预防可能发生的一切攻击或危险。
guard普通用词，指保持警惕以防可能的攻击或伤害。
shield语气比protect强，但侧重防止迫在眉睫的攻击或伤害。
shelter通常指寻找安全地方躲避风雨或使人免遭危害。
harbour贬义词，指隐匿或非法保护、窝藏。
- protect against a challenge or attack
- to keep watch over
- take precautions in order to avoid some unwanted consequence
- the person who plays the position of guard on a basketball team
- a group of men who escort and protect some important person
- a person who keeps watch over something or someone
- a device designed to prevent injury
- a posture of defence in boxing or fencing
- a position on the line of scrimmage
- watch over or shield from danger or harm; protect
- the person who plays that position on a football team
- a precautionary measure warding off impending danger or damage or injury etc.
- a position on a basketball team
- the duty of serving as a sentry