Source : Webster's Revised Unabridged Dictionary (1913)

Leather \Leath"er\, v. t. [imp. & p. p. {Leathered}; p. pr. &
   vb. n. {Leathering}.]
   To beat, as with a thong of leather. [Obs. or Colloq.] --G.
   Eliot.

Source : WordNet®

leathered
     adj : resembling or made to resemble leather; tough but pliable
           [syn: {coriaceous}, {leatherlike}, {leathery}]