Source : Webster's Revised Unabridged Dictionary (1913)

--Chaucer.

      He was but rude in the profession of arms.  --Sir H.
                                                  Wotton.

      the rude forefathers of the hamlet sleep.   --Gray.
      (c) Violent; tumultuous; boisterous; inclement; harsh;
          severe; -- said of the weather, of storms, and the
          like; as, the rude winter.

                [Clouds] pushed with winds, rude in their shock.
                                                  --Milton.

                The rude agitation [of water] breaks it into
                foam.                             --Boyle.
      (d) Barbarous; fierce; bloody; impetuous; -- said of war,
          conflict, and the like; as, the rude shock of armies.
      (e) Not finished or complete; inelegant; lacking
          chasteness or elegance; not in good taste;
          unsatisfactory in mode of treatment; -- said of
          literature, language, style, and the like. ``The rude
          Irish books.'' --Spenser.

                Rude am I in my speech.           --Shak.

                Unblemished by my rude translation. --Dryden.

   Syn: Impertinent; rough; uneven; shapeless; unfashioned;
        rugged; artless; unpolished; uncouth; inelegant; rustic;
        coarse; vulgar; clownish; raw; unskillful; untaught;
        illiterate; ignorant; uncivil; impolite; saucy;
        impudent; insolent; surly; currish; churlish; brutal;
        uncivilized; barbarous; savage; violent; fierce;
        tumultuous; turbulent; impetuous; boisterous; harsh;
        inclement; severe. See {Impertiment}. -- {Rude"ly}, adv.
        -- {Rude"ness}, n.

Source : WordNet®

rudeness
     n 1: a manner that is rude and insulting [syn: {discourtesy}]
          [ant: {courtesy}]
     2: a wild or unrefined state [syn: {crudeness}, {crudity}, {primitiveness},
         {primitivism}]