forewarn

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forewarn someone about something

 and forewarn someone of something
to warn someone about someone or something. They forewarned us of your strange behavior. Didn't we forewarn you about Max's problem?
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Forewarned is forearmed.

Prov. If you know about something beforehand, you can prepare for it. Before you meet Lily, I should tell you that she's a little eccentric. Forewarned is forearmed, right? Check the temperature before you go outside. Forewarned is forearmed.
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forewarned is forearmed

paying attention to a warning allows you to prepare for trouble Viruses can ruin any computer and antiviral programs give protection - forewarned is forearmed!
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Forewarned is forearmed.

something that you say which means that if you know about something before it happens, you can be prepared for it Apparently Simon has some criticisms of my book. Still, forewarned is forearmed.
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forewarned is forearmed

Knowledge in advance enables one to be prepared, as in Let me know when he's in town so I can take the phone off the hook-forewarned is forearmed. This expression originated as a Latin proverb, Praemonitus, praemunitus, which was translated into English by the early 1500s. It soon was put to broader use than its original military applications.
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References in periodicals archive ?
McDonald's stated goal," forewarns Brownell, "is to have no American living more than four minutes away from one of its restaurants.
Today, on the fourth anniversary of the quake, the Red Cross forewarns that being prepared and educated before the next quake strikes is the best way to save lives and limit recovery time.
Lane Information - Available in 50 markets, the system forewarns drivers on its display of the proper driving lane they should be in for passage through interchanges and exits.
Dynamically tracking associated labor charges helps to keep project and contract costs under budget and forewarns of potential overruns.