(v. i.) To talk or confer secretly and confidentially; to converse, especially with evil intentions; to plot mischief.

acquaint admonish advertise advertise of advocate alert apprise brief bring word caution clue coach coax collogue commend communicate confab confabulate confer consult consult with counsel cry havoc deliberate direct disclose encourage enlighten familiarize fill in forewarn give fair warning give notice give the facts give warning give word guide huddle impart induce inform instruct issue an ultimatum kibitz leave word let know let out meddle mention to notify parley persuade post powwow prescribe propose recommend register report reveal send word serve notice sound the alarm speak submit suggest tell threaten tip tip off treat urge utter a caveat verse warn warn against win over