Source : Webster's Revised Unabridged Dictionary (1913)

Aver \A*ver"\ ([.a]*v[~e]r"), v. t. [imp. & p. p. {Averred}
   ([.a]*v[~e]rd"); p. pr. & vb. n. {Averring}.] [F. av['e]rer,
   LL. adverare, averare; L. ad + versus true. See {Verity}.]
   1. To assert, or prove, the truth of. [Obs.]

   2. (Law) To avouch or verify; to offer to verify; to prove or
      justify. See {Averment}.

   3. To affirm with confidence; to declare in a positive
      manner, as in confidence of asserting the truth.

            It is sufficient that the very fact hath its
            foundation in truth, as I do seriously aver is the
            case.                                 --Fielding.

            Then all averred I had killed the bird. --Coleridge.

   Syn: To assert; affirm; asseverate. See {Affirm}.

Source : WordNet®

aver
     v 1: report or maintain; "He alleged that he was the victim of a
          crime"; "He said it was too late to intervene in the
          war"; "The registrar says that I owe the school money"
          [syn: {allege}, {say}]
     2: to declare or affirm solemnly and formally as true; "Before
        God I swear I am innocent" [syn: {affirm}, {verify}, {assert},
         {avow}, {swan}, {swear}]
     [also: {averring}, {averred}]

averred
     See {aver}