Some people have a letch for unmasking impostors, or for avenging the wrongs of others. --De Quincey.
2. A {lecher}. [slang] [PJC]
Leach \Leach\, n. [Written also {letch}.] [Cf. As. le['a]h lye, G. lauge. See {Lye}.] 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.
Lecher \Lech"er\, n. [OE. lechur, lechour, OF. lecheor, lecheur, gormand, glutton, libertine, parasite, fr. lechier to lick, F. l['e]cher; of Teutonic origin. See {Lick}.] A man given to lewdness; one addicted, in an excessive degree, to the indulgence of sexual desire, or to illicit sexual relations with women; also called {letch} and {lech}.