Wordnet 3.0
ADJECTIVE (1)
1. 
 deterring from action; 
- Example: "dissuasive advice"- Example: "made a slight dissuasive gesture with her hand"
The Collaborative International Dictionary of English v.0.48:
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.
   [1913 Webster]
WordNet (r) 3.0 (2006):
dissuasive
    adj 1: deterring from action; "dissuasive advice"; "made a
           slight dissuasive gesture with her hand" [ant:
           persuasive]