Thievishly definitions

Webster's 1828 Dictionary

THIE'VISHLY, adv. In a thievish manner; by theft.

WordNet (r) 3.0 (2005)

adv
1: in a manner characteristic of a thief

Merriam Webster's

adverb see thievish

Webster's 1913 Dictionary

Thievish Thiev"ish, a. 1. Given to stealing; addicted to theft; as, a thievish boy, a thievish magpie. 2. Like a thief; acting by stealth; sly; secret. Time's thievish progress to eternity. --Shak. 3. Partaking of the nature of theft; accomplished by stealing; dishonest; as, a thievish practice. Or with a base and biosterous sword enforce A thievish living on the common road. --Shak. -- Thiev"ish*ly, adv. -- Thiev"ish*ness, n.