Source : Webster's Revised Unabridged Dictionary (1913)

Unrude \Un*rude"\, a. [Pref. un- + rude. In sense 2 un- is
   intensive.]
   1. Not rude; polished. --Herrick.

   2. Excessively rude. [Obs. & R.] ``See how the unrude rascal
      backbites him.'' --B. Jonson.