disclaunder

from The Collaborative International Dictionary of English v.0.48

Disclaunder \Dis*claun"der\, v. t. [From OE. disclaundre, n.,
   for sclandre, esclandre, OF. esclandre. See {Sclaundre},
   {Slander}.]
   To injure one's good name; to slander. [Obs.]
   [1913 Webster]