Source : Webster's Revised Unabridged Dictionary (1913)

Brast \Brast\, v. t. & i. [See {Burst}.]
   To burst. [Obs.]

         And both his y["e]n braste out of his face. --Chaucer.

         Dreadfull furies which their chains have brast.
                                                  --Spenser.

Breste \Bres"te\, v. t. & i. [imp. {Brast}; p. p. {Brusten},
   {Borsten}, {Bursten}.]
   To burst. [Obs.] --Chaucer.