dǎ​cǎo​jīng​shé

alert enemy

打草惊蛇 (打草驚蛇) dǎ​cǎo​jīng​shé
alert enemy idiom
To inadvertently alert an enemy or target by acting prematurely or carelessly.

We must keep quiet during our operation and avoid alerting the enemy.

warn others idiom
To punish someone as a warning to others or to serve as a deterrent.

He originally did this to serve as a warning to others.

Frequency

Movie subtitles
1.49 per million appears in 1% of films
Written text
0.696 per million

Sources

Definitions
CC-CEDICT