adjective (a)

• of a quantity that can fulfill a need or requirement but without being abundant(adj.all)

  Example:
  Sufficient food.
  

  Antonym:
  deficient, insufficient
  

  source: wordnet30
• Equal to the end proposed; adequate to wants; enough; ample; competent; as, provision sufficient for the family; an army sufficient to defend the country.(adjective)

  source: webster1913