英 [ə'trɪsk] 美 [ə'trɪsk]

adj. 危险的；处于危险中的

n. 风险；危险

用法：形容词，作定语或表语。

例句：

1. The children were at risk of falling off the cliff if they got too close to the edge.

这些孩子如果走得太近悬崖边缘，就有掉下去的危险。

2. The company is at risk of bankruptcy if they don't increase their sales.

如果公司不增加销售额，就有破产的风险。

3. The soldiers knew that going on this mission would put them at risk.

士们知道参加这次任务会让他们处于危险之中。

4. She didn't want to put her health at risk by eating unhealthy food.

她不想通过吃不健康的食物来危害自己的健康。

5. Investors are always looking for ways to minimize the risks involved in their investments.

投资者总是寻找减少投资风险的方法。

同义词及用法：

1. Hazardous (adj.) - involving risk or danger

Example: The hazardous chemicals must be handled with extreme care.

2. Perilous (adj.) - full of danger or risk

Example: It was a perilous journey through the mountains during the storm.

3. Endangered (adj.) - in danger of becoming extinct or disappearing

Example: Many species of animals are endangered due to habitat destruction.

4. Vulnerable (adj.) - susceptible to harm or damage

Example: The elderly are more vulnerable to the flu than younger people.

5. Insecure (adj.) - not safe or protected; unsure or uncertain

Example: She felt insecure walking alone at night in the city.

编辑总结：

Atrisk是一个形容词，用来形容处于危险中的人或物。它可以作为定语或表语，表示某人或某物存在风险或处于危险之中。同义词包括hazardous、perilous、endangered、vulnerable和insecure等，它们都有着类似的意思，但在使用时需要注意区分。使用atrisk时要注意上下文，避免歧义。