防 (fáng): เพื่อปกป้อง

Before going out in winter, the mother puts a hat and gloves on her child to prevent him from catching a cold.

To prevent floods from rushing into the village, the villagers reinforced the riverbank overnight.

The teacher reminded the students to review well before the exam, just in case unexpected questions appear.

Installing antivirus software on a computer can protect against viruses and keep personal information from being stolen.