惊动 (jīng dòng): 警報に

In the middle of the night, a loud crash suddenly came from the neighbor's apartment and alarmed everyone in the whole building, so people opened their doors one after another to see what had happened.

For such a small matter, why bother alarming the principal? Just talk it over with your homeroom teacher first.

So as not to disturb her mother, who was taking a nap, she closed the door very quietly and didn't even dare put on her slippers.

The heavy rain alarmed the entire city; many roads were flooded, and firefighters were sent out overnight to rescue people.

When the reporters heard that the writer had quietly arrived at the bookstore, they all rushed over, briefly drawing the attention of many passersby.