The Collaborative International Dictionary of English v.0.48:

Wendic \Wend"ic\, Wendish \Wend"ish\, a.
   Of or pertaining the Wends, or their language.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Wendic \Wend"ic\, n.
   The language of the Wends.
   [1913 Webster]