guarded

动词 guard:

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

形容词 guarded:

1. prudent
   同义词：restrained

1. The building is guarded by a fence and ten guard dogs.
   建筑物由篱笆和10条守卫狗保护着。
2. All the approaches to the palace were guarded by troops.
   通往宫殿的所有道路都有部队把守。
3. The prisoners closely guarded escaped from the prison last night.
   被严密监视的这些囚犯昨夜越狱了。
4. The dog guarded the house against strangers.
   狗守卫着房屋，不让陌生人进去。

guard.ed

adj.（形容词）
Protected; defended.
被保护的；被防卫的
Watched over; supervised.
监视的；监督的
Cautious; restrained:
谨慎的；受限制的：
例句：
We view these changes with guarded optimism.
我们以审慎的乐观看待这些变化

【引伸】
guard.edly
adv.（副词）
guard.edness
n.（名词）