warn

警告、示警

The signs warn drivers about falling rocks on this road.

告示牌警告駕駛人這條路上有落石。

告誡、勸告

My doctor warned me to cut down on salt.

醫生告誡我要減少鹽分攝取。

預先通知、事先告知

They warned us that the meeting might run late.

他們事先告知我們會議可能會延後結束。

發出警告

Economists have warned of another downturn next year.

經濟學家已對明年可能再度衰退提出警告。

警告離開、勸阻

Security guards warned us off the construction site.

警衛警告我們離開工地。