Serving as a warning or reprimand.

चेतावनी देने वाला

English Usage: The teacher gave an admonitory glance to the students who were talking during the lecture.

Hindi Usage: शिक्षक ने उन छात्रों को चेतावनी देने वाली नजर से देखा जो व्याख्यान के दौरान बातचीत कर रहे थे।