unquestioning

from WordNet (r) 3.0 (2006)

unquestioning
    adj 1: not inclined to ask questions
    2: being without doubt or reserve; "implicit trust" [syn:
       {implicit}, {unquestioning}]

from The Collaborative International Dictionary of English v.0.48

Unquestioning \Unquestioning\
   See {questioning}.

from Moby Thesaurus II by Grady Ward, 1.0

59 Moby Thesaurus words for "unquestioning":
      abiding, absolute, admitting no exception, all-out, categorical,
      clear, complete, conclusive, decided, decisive, definite,
      definitive, determinate, downright, enduring, entire, explicit,
      express, final, firm, fixed, flat, flat-out, global, implicit,
      inappealable, indisputable, never-failing, out-and-out, outright,
      peremptory, perfect, positive, round, steadfast, steady, straight,
      straight-out, total, uncircumscribed, unconditional, unconditioned,
      undoubting, unequivocal, unhampered, unhesitating, unlimited,
      unmistakable, unmitigated, unqualified, unreserved, unrestricted,
      unshakable, unshaken, unwaivable, utter, whole, without exception,
      without reserve