| 防 |
fáng dǔ | to prevent / to combat / to counter |
| 防 |
fáng | to protect / to defend / to guard against / to prevent |
| 堵 |
dǔ | to block up (a road, pipe etc) / to stop up (a hole) / (fig.) (of a person) choked up with anxiety or stress / wall (literary) / (classifier for walls) |