Cautionary advice about something imminent (especially imminent danger or other unpleasantness)(noun)
WordNet. Princeton University. 2010.
Use "word of advice" in a sentence
"And is our legislator to have no preface to his laws, but to say at once Do this, avoid that — and then holding the penalty in terrorem to go on to another law; offering never a word of advice or exhortation to those for whom he is legislating, after the manner of some doctors?"
"So I have a word of advice for Barges at this point: if you are married to a Tugboat or a Sailboat who leads with an I or M, allow your spouse to teach you the art of intimacy."