Simple past tense and past participle of forearm.(verb)
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Use "forearmed" in a sentence
"With all the crazies in New York, forewarned is forearmed."
"He also touches upon the theory behind legal education itself which provides a useful view into the heads of Canadian law school administrators everywhere (forewarned is forearmed)."
"Knowing your Inner Critic allows you to be forewarned and thus, forearmed."