forewarned is forearmed

Idioms & Phrases

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 hookforewarned 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.

The American Heritage® Dictionary of Idioms by Christine Ammer.
Copyright © 1997. Published by Houghton Mifflin.
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