inform, caution; warn, admonish, forewarn; forewarn against something, give someone notice, notify someone of something; sound an alarm, croak, forebode
They warned the ship about the danger. - Ils avertirent le navire du danger.
We can't just cut people's salaries without giving them some warning. - Nous ne pouvons pas simplement tailler dans les salaires des gens sans les avertir.