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to alert
01
警告する, 注意を促す
to warn someone of a possible danger, problem, or situation that requires their attention
Transitive: to alert sb of a danger or problem | to alert sb to a danger or problem
Example
The security system alerted the homeowners to a possible break-in with a loud alarm.
The weather service will alert residents of the approaching storm tomorrow.
The emergency broadcast system is currently alerting citizens of the evacuation procedures.
alert
Example
The alert security guard spotted the intruder before they could enter the building.
She remained alert during the meeting, ready to contribute valuable insights at any moment.
The alert hiker noticed the subtle changes in the weather and decided to head back before the storm hit.
02
警戒している, 注意深い
engaged in or accustomed to close observation
03
素早い (Subayai), 元気な (Genkina)
quick and energetic
Alert
01
警報 (けいほう), 警告 (けいこく)
a warning about a danger, problem, or threat
02
警報（けいほう）, アラート
an automatic signal (usually a sound) warning of danger
03
アラート, 警戒
a situation where people are ready to confront a threat
Example
The soldiers were placed on high alert as intelligence suggested an imminent attack from enemy forces.
The city declared a state of emergency and put all emergency response teams on alert following the earthquake.
The neighborhood watch group organized a patrol to keep the community on alert for any suspicious activity.
