thievish \thiev"ish\, a.
   1. given to stealing; addicted to theft; as, a thievish boy,
      a thievish magpie.
      1913 webster

   2. like a thief; acting by stealth; sly; secret.
      1913 webster

            time's thievish progress to eternity. --shak.
      1913 webster

   3. partaking of the nature of theft; accomplished by
      stealing; dishonest; as, a thievish practice.
      1913 webster

            or with a base and biosterous sword enforce
            a thievish living on the common road. --shak.
      1913 webster -- thiev"ishly, adv. --
      thiev"ishness, n.
      1913 webster
see also:
thiev"ishly thiev"ishness 

thievishness
     n : having a disposition to steal syn: larcenous
see also:
larcenous