The Collaborative International Dictionary of English v.0.48:

Disponge \Dis*ponge"\, v. t. [Pref. dis- + sponge.]
   To sprinkle, as with water from a sponge. [Poetic & Rare]
   [Written also dispunge.]
   [1913 Webster]

         O sovereign mistress of true melancholy,
         The poisonous damp of night disponge upon me. --Shak.
   [1913 Webster]