cau = to take care

來(lái)自拉丁語(yǔ)的cau 意為to take care。

1.precaution（事先小心或注意pre(=before) + cau(=take care)）
n.謹(jǐn)慎；警惕；預(yù)防
precautionary adj.警惕的；預(yù)防的
As a precaution ,please fasten your seat belt before starting the car.作為一種預(yù)防措施，請(qǐng)?jiān)诎l(fā)動(dòng)車之前系好安帶。

2.caution
n.小心，慎重；警告；（外貌、行動(dòng)或言語(yǔ)等）令人發(fā)笑的 v.使某人小心；警告
cautionary adj.警告的；告誡的
cautionary tales 警世故事
We were cautioned not to drive fast.我們被警告不能開(kāi)快車。

3.cautious
adj.謹(jǐn)慎的，小心的
cautiously adv.謹(jǐn)慎地，小心地
cautious about giving offense 唯恐讓對(duì)方生氣而小心翼翼的