The Collaborative International Dictionary of English v.0.48:

Unreserved \Unreserved\
   See reserved.

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):

unreserved
    adj 1: not reserved [ant: reserved]
    2: not cautious or reticent; "unreserved behavior" [ant:
       reserved]

Moby Thesaurus II by Grady Ward, 1.0:

193 Moby Thesaurus words for "unreserved":
   abandoned, absolute, accessible, admitting no exception,
   all-embracing, all-encompassing, all-out, all-pervading,
   approachable, artless, bluff, blunt, born, born yesterday, breezy,
   broad, broad-based, brusque, candid, casual, categorical,
   childlike, clean, clear, communicative, complete, comprehensive,
   conclusive, confiding, congenital, consummate, conversable,
   decided, decisive, deep-dyed, definite, definitive, degage,
   demonstrative, determinate, direct, downright, dyed-in-the-wool,
   effusive, egregious, entire, exhaustive, expansive, explicit,
   express, extroverted, final, fixed, flat, flat-out, forthright,
   frank, frankhearted, free, free-speaking, free-spoken,
   free-tongued, genuine, global, go-go, gossipy, guileless,
   heart-to-heart, immoderate, implicit, inappealable, incontinent,
   indisputable, indulgent, informal, ingenu, ingenuous, innocent,
   intemperate, intensive, irrepressible, lax, licentious, loose,
   low-pressure, naive, newsy, nonrestrictive, omnibus, omnipresent,
   open, openhearted, out of control, out of hand, out-and-out,
   outgoing, outright, outspoken, peremptory, perfect, permissive,
   pervasive, plain, plain-spoken, plumb, positive, pure, radical,
   rampant, regular, reinless, relaxed, riotous, round,
   self-revealing, self-revelatory, sheer, simple, simplehearted,
   simpleminded, sincere, single-hearted, single-minded, sociable,
   straight, straight-out, straightforward, sweeping, talkative,
   thorough, thoroughgoing, through-and-through, total, transparent,
   trustful, trusting, ubiquitous, unbridled, unchecked,
   uncircumscribed, uncoerced, uncompelled, unconcealed,
   unconditional, unconditioned, unconstrained, uncontrolled,
   uncurbed, undisguised, undissembled, undoubting, unequivocal,
   unforced, unfussy, ungoverned, unguarded, unhampered, unhesitating,
   uninhibited, universal, unlimited, unmastered, unmeasured,
   unmistakable, unmitigated, unmuzzled, unqualified, unquestioning,
   unreined, unrepressed, unrestrained, unrestricted, unrestrictive,
   unreticent, unruly, unsecretive, unshrinking, unsilent,
   unsophisticated, unsubdued, unsuppressed, unsuspicious,
   unvarnished, unwaivable, unwary, utter, veritable, wanton, whole,
   wholesale, wild, without exception, without reserve