forewarn

vt. caution beforehand. inform previously预先警告，预告。
△3H.VI.4.1.113:“Well. I will arm me(i.e. myself),being thus forewarned.” (Proverb:“Forewarned is forearmed.”)好，既然得到了这样的预先警告，我就武装起来。
～vb.
well forewarning: truthfully forewarning诚实预告的。
△2H.VI.3.2.85:“What boded this,but well forewarning wind / Did seem to say. ‘Seek not ascorpion’s nest,/ Nor set no footing on this unkindshore?’”这预兆着什么？那风还不是诚实地向我警告，仿佛说：“不要找一个蝎子窠，也不要踏上这个无情无义的海岸？”

forewarn[fɔ:ˈwɔ:n]

v. 预先警告，预警