adjective (a)

• not preventive(adj.all)

  Antonym:
  preventative, preventive
  

  source: wordnet30
• granting or inclined or able to grant permission; not strict in discipline(adj.all)

  Example:
  Direct primary legislation is largely permissive rather than prescriptive.
  Permissive parents.
  

  Antonym:
  unpermissive
  

  source: wordnet30
• Permitting; granting leave or liberty.(adjective)

  source: webster1913