inexplicit

from WordNet (r) 3.0 (2006)

inexplicit
    adj 1: implied though not directly expressed; inherent in the
           nature of something; "an implicit agreement not to raise
           the subject"; "there was implicit criticism in his
           voice"; "anger was implicit in the argument"; "the oak is
           implicit in the acorn" [syn: {implicit}, {inexplicit}]
           [ant: {explicit}, {expressed}]

from The Collaborative International Dictionary of English v.0.48

Inexplicit \In`ex*plic"it\, a. [L. inexplicitus: cf. F.
   inexplicite. See {In-} not, and {Explicit}.]
   Not explicit; not clearly stated; indefinite; vague.
   [1913 Webster]