rotten \rot"ten\, a. icel. rotinn; akin to sw. rutten, dan.
   radden. see rot.
   having rotted; putrid; decayed; as, a rotten apple; rotten
   meat. hence:
   a offensive to the smell; fetid; disgusting.
       1913 webster

             you common cry of curs whose breath i hate
             as reek of the rotten fens.          --shak.
       1913 webster
   b not firm or trusty; unsound; defective; treacherous;
       unsafe; as, a rotten plank, bone, stone. "the deepness of
       the rotten way." --knolles.
       1913 webster

   rotten borough. see under borough.

   rotten stone min., a soft stone, called also tripoli
      from the country from which it was formerly brought,
      used in all sorts of finer grinding and polishing in the
      arts, and for cleaning metallic substances. the name is
      also given to other friable siliceous stones applied to
      like uses.
      1913 webster

   syn: putrefied; decayed; carious; defective; unsound;
        corrupt; deceitful; treacherous.
        1913 webster -- rot"tenly, adv. -- rot"tenness,
        n.
        1913 webster
see also:
rot rotten borough borough rotten stone rot"tenly rot"tenness 

rottenly
     adv : in a terrible manner; "she sings terribly" syn: terribly,
            atrociously, awfully, abominably, abysmally
see also:
terribly atrociously awfully abominably abysmally