forewarn

v 1 [Tn, Tn.pr, Dn.f] ~ sb (of sth) warn sb before sth happens; advise sb (of possible dangers, problems, etc) 预先警告某人; 告诉某人（可能出现危险、 问题等）: We had been forewarned of the risk of fire/that fire could break out. 已经事先警告过我们有发生火灾的危险. 2 (idm 习语) fore,warned is fore`armed (saying 谚) knowledge of possible dangers, problems, etc allows one to prepare for them 有备无患.

foresail, foresee, foreseeable, foreseen, foreshadow, foreshore, foreshorten, foresight, foreskin, forest, forestall, forested, forester, forestland, forestry, foretaste, foretell, forethought, foretold, forever, foreword, forfeit, forfeiture, forgather (also foregather), forgave, forge, forger, forgery, forget, forget about, forget-me-not, forgetful, forgetfully, forgetfulness, forging, forgivable, forgive, forgive sb. for sth., forgiveness, forgiving,