letch /ˈlɛʧ/
  色慾,好色者
  Leach, n. [Written also letch.]
  1. A quantity of wood ashes, through which water passes, and thus imbibes the alkali.
  2. A tub or vat for leaching ashes, bark, etc.
  Leach tub, a wooden tub in which ashes are leached.
  Letch, n.
  1. Strong desire; passion; especially, lust. [Archaic]
     Some people have a letch for unmasking impostors, or for avenging the wrongs of others.   --De Quincey.
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  letch
       n : man with strong sexual desires [syn: satyr, lecher, lech]