The Collaborative International Dictionary of English v.0.48:
Rotten \Rot"ten\, a. [Icel. rotinn; akin to Sw. rutten, Dan.
radden. See Rot.]
Having rotted; putrid; decayed; as, a rotten apple; rotten
(a) Offensive to the smell; fetid; disgusting.
You common cry of curs! whose breath I hate
As reek of the rotten fens. --Shak.
(b) Not firm or trusty; unsound; defective; treacherous;
unsafe; as, a rotten plank, bone, stone. "The deepness of
the rotten way." --Knolles.
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
Syn: Putrefied; decayed; carious; defective; unsound;
corrupt; deceitful; treacherous.
[1913 Webster] -- Rot"ten*ly, adv. -- Rot"ten*ness,