The Collaborative International Dictionary of English v.0.48:
Uncompromising \Un*com"pro*mi`sing\, a. Not admitting of compromise; making no truce or concessions; obstinate; unyielding; inflexible. -- Un*com"pro*mi`sing*ly, adv. [1913 Webster]WordNet (r) 3.0 (2006):
uncompromisingly adv 1: in an uncompromising manner