Source : Webster's Revised Unabridged Dictionary (1913)

Dissuasive \Dis*sua"sive\, a.
   Tending to dissuade or divert from a measure or purpose;
   dehortatory; as, dissuasive advice. -- n. A dissuasive
   argument or counsel; dissuasion; dehortation. --Prynne. --
   {Dis*sua"sive*ly}, adv.

Source : WordNet®

dissuasive
     adj : deterring from action; "dissuasive advice"; "made a slight
           dissuasive gesture with her hand" [ant: {persuasive}]