thiefly

adj

1. (archaic)Like a thief; thievish.

   “Most patiently, with noiseless tread, I then did Make thro' those sumptuous halls my thiefly way, Until at last I reached the chamber splendid Where Hobart Chatfield Chatfield slumb'ring lay.”

   “In bantering gusto he went right on with his thiefly enterprise.”

   “Rogues are characters with some expertise in thiefly abilities and more specialized knowledge of arms than that possessed by Fighters.”

   “It would be a sad thing to enter this dark time and then to have an eternal reality stolen and lessened in a thiefly sort of way at the door of death through a life that was lived in a less than honorable fashion.”

   “...here he was, bent on one last thiefly act.”

adv

1. (rare)Like a thief; thievishly.

   “What great is living so thiefly!!! (Like a thief).”

   “Downyng described Sybbesoun as "a strong thief to Wood Mill, for truly he and his wife have procured my servant and my goods, that is to say wheat and rye by the bushel and the half, as thiefly and as un-truly as he might do."”