Alarm

“Alarm” is a slang term used to describe a state of extreme alertness or heightened awareness. It implies being on high alert or being extremely attentive to one’s surroundings. This term is often used to express a sense of vigilance or being on guard.

Example 1: “After the recent break-ins, the security guards were on alarm, checking every corner of the building constantly.”

Example 2: “The hikers were on alarm as they ventured through the dense forest, listening carefully for any signs of danger.”