tripwire

1. A cord or wire arranged so that when snagged or pulled by an intruder, it will trigger a detector or trap or a device, such as a land mine.

   Seeing the tripwire of a nearby bouncing Betty gave us cold chills, and we moved all the more slowly through the woods.

   Stolperdraht

   про́волока взрыва́теляpróvoloka vzryvátelja, про́волочная нить-растя́жкаpróvoločnaja nitʹ-rastjážka

2. (figuratively)Any means of detecting intruders or attackers.

regular

• trip wirealternative