Source : Webster's Revised Unabridged Dictionary (1913)

Misfall \Mis*fall"\, v. t. [imp. {Misfell}; p. p. {Misfallen};
   p. pr. & vb. n. {Misfalling}.]
   To befall, as ill luck; to happen to unluckily. [Obs.]
   --Chaucer.