厳げん戒かい態たい勢せい

noun, noun which may take the genitive case particle 'no'

high alert; state of high alert; on alert

Refers to a heightened security or readiness posture, often used in news reports about police, military, or disaster preparedness.

• 警けい察さつはテロに備そなえて厳げん戒かい態たい勢せいを敷しいた。

  The police were on high alert against terrorism.

• 空くう港こうは厳げん戒かい態たい勢せいで警けい備びされていた。

  The airport was under tight security in a state of high alert.