Get the FREE one-click dictionary software for Windows
or the iPhone/iPad and Android apps
Adjective: thievish  thee-vish
  1. Given to stealing
    "The thievish servants took many valuables over the years";
    - thieving, larcenous [informal], light-fingered [informal], furacious [archaic]

See also: dishonest, dishonorable [US], dishonourable [Brit, Cdn]