unintelligible

from WordNet (r) 3.0 (2006)
unintelligible
    adj 1: poorly articulated or enunciated, or drowned by noise;
           "unintelligible speech" [ant: {intelligible}]
    2: not clearly understood or expressed [syn: {opaque},
       {unintelligible}]
from The Collaborative International Dictionary of English v.0.48
Unintelligible \Unintelligible\
   See {intelligible}.
from Bouvier's Law Dictionary, Revised 6th Ed (1856)
UNINTELLIGIBLE. That which cannot be understood. 
     2. When a law, a contract, or will, is unintelligible, it has no effect 
whatever. Vide Construction, and the authorities there referred to.
from Moby Thesaurus II by Grady Ward, 1.0
23 Moby Thesaurus words for "unintelligible":
      Greek to one, ambiguous, amphibological, beyond understanding,
      equivocal, impenetrable, inarticulate, incognizable, incoherent,
      incomprehensible, inscrutable, numinous, opaque,
      past comprehension, rambling, tenebrous, uncertain, unclear,
      unconnected, unfathomable, unknowable, unsearchable, vague
antiflux / dictionary / unintelligible
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