verb

persuade (someone) not to take a particular course of action.

his friends tried to dissuade him from flying

discourage,deter,prevent,disincline,turn aside,divert,sidetrack,talk out of,persuade against,persuade not to,argue out of,put off,stop,scare off,warn off,advise against,urge against,advise/urge not to,caution against,expostulate against,dehort