sentinel

• Существительное, обозначающее человека или объект, используемый для наблюдения за каким-либо ожидаемым событием или опасностью.

A noun referring to a person or thing employed to keep watch for some anticipated event or danger.

1. Guard or WatchpersonB2formal

   A person employed to keep watch for some anticipated event, such as an attack or danger.

   Часовой

   • The sentinel stood guard at the castle gate all night.
   • A sentinel was posted on the hill to watch for approaching enemies.
   • The sentinel's duty was to alert the camp of any threats.

   Synonymsguardlookoutpicketsentrywatcherwatchman

2. Protective SystemC1formal

   A device or system that monitors for specific events or dangers.

   Сторожевая система

   • The security system acts as a sentinel against intruders.
   • Software sentinels monitor network traffic for suspicious activity.
   • The early warning system is a sentinel for natural disasters.

   Synonymsdetectorguardianmonitorsensorwatchdog