The Collaborative International Dictionary of English v.0.48:
Unscrupulous \Un*scru"pu*lous\, a. Not scrupulous; unprincipled. -- Un*scru"pu*lous*ly, adv. -- Un*scru"pu*lous*ness, n. [1913 Webster]WordNet (r) 3.0 (2006):
unscrupulousness n 1: the quality of unscrupulous dishonesty [ant: scrupulousness]