The Collaborative International Dictionary of English v.0.48:
Unreserved \Un`re*served"\, a. Not reserved; not kept back; not withheld in part; unrestrained. -- Un`re*serv"ed*ly, adv. -- Un`re*serv"ed*ness, n. [1913 Webster]WordNet (r) 3.0 (2006):
unreservedly adv 1: without reservation; "I can unreservedly recommend this restaurant!"