名詞 precaution:

1. a precautionary measure warding off impending danger or damage or injury etc.
   同義詞：safeguard, guard
2. the trait of practicing caution in advance
3. judiciousness in avoiding harm or danger
   同義詞：caution, care, forethought

1. The report is scathing about the lack of safety precaution.
   該報道對缺乏安全預防措施一事嚴加指責。
2. All this wake the local government to the need for safety precaution.
   所有這些使當?shù)卣J識到必須采取安全預防措施。
3. You should take an umbrella just as a precaution.
   你該帶把傘，有備無患。
4. I took the precaution of locking everything in the safe.
   我把一切東西都鎖在保險箱里以防萬一。

pre.cau.tion

n.（名詞）
An action taken in advance to protect against possible danger or failure; a safeguard:
預防，防備：預先采取動作以預防可能的危險或失?。槐Ｗo：
例句：
He took every precaution but still got a bad deal on that used car.
他處處小心但還是在舊車交易中受騙

Caution practiced in advance; forethought or circumspection:
預先作出的警告；深思熟慮或周密慎重：
例句：
Precaution was impossible in those dire circumstances.
在緊迫的環(huán)境下無暇再去周密慎重

來源：
Late Latin praecautiô praecautiôn-
后期拉丁語 praecautiô praecautiôn-
from praecautus
源自 praecautus
past participle of Latin praecavôre [to guard against]
拉丁語 praecavôre的過去分詞 [保護]
prae- [pre-]
prae- [前綴]
cavôre [to beware]
cavôre [意識到]