jiè​yán

emergency measures

戒严 (戒嚴) jiè​yán
emergency measures verb
to implement strict security protocols or restrict access to a specific area for the safety of a high-level official or event

Due to the visit of foreign guests, temporary martial law was imposed around the square.

martial law verb
to impose a state of martial law, typically placing an area under direct military or police control due to civil unrest

The government declared martial law throughout the city after the situation got out of control.

Frequency

Movie subtitles
1.13 per million appears in 1% of films
Written text
1.36 per million

Sources

Definitions
CC-CEDICT