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"ish*ly, adv. -- Thiev"ish*ness, n. [ 1913 Webster ]