严禁 (yán jìn): ต้องห้ามอย่างเคร่งครัด

A prominent notice is posted at the entrance to the museum exhibition hall: Touching exhibits is strictly prohibited.

To ensure passenger safety, smoking is strictly prohibited in subway cars; violators will be fined.

The school clearly stipulates that during exams, using mobile phones is strictly prohibited; once discovered, the exam score will be cancelled.

The librarian reminds readers: Eating and drinking are strictly prohibited in the library; please store drinks and food in the designated area.