to prevent; to guard against; to take precautions

defense; to defend

to defend; to protect (against)

to defend; defensive; defense

defensive line or perimeter; CL:道[dao4]

(so as) to avoid; to prevent; (just) in case

firefighting; fire control

national defense

to guard against; to be vigilant; watch you don't (slip); Taiwan pr. [ti2 fang2]

to prevent; to take precautions against; to protect; to guard against; precautionary; prophylactic