The Collaborative International Dictionary of English v.0.48:

Bewray \Be*wray"\, v. t. [imp. & p. p. Bewrayed (-r[=a]d"); p.
   pr. & vb. n. Bewraying.] [OE. bewraien, biwreyen; pref. be-
   + AS. wr[=e]gan to accuse, betray; akin to OS. wr[=o]gian,
   OHG. ruog[=e]n, G. r["u]gen, Icel. r[ae]gja, Goth. wr[=o]hjan
   to accuse.]
   To expose; to reveal; to disclose; to betray. [Obs. or
   Archaic]
   [1913 Webster]

         The murder being once done, he is in less fear, and in
         more hope that the deed shall not be bewrayed or known.
                                                  --Robynson
                                                  (More's
                                                  Utopia. )
   [1913 Webster]

         Thy speech bewrayeth thee.               --Matt. xxvi.
                                                  73.
   [1913 Webster]