Source : Webster's Revised Unabridged Dictionary (1913)

Nefand \Ne"fand\, Nefandous \Ne*fan"dous\, a. [L. nefandus not
   to be spoken; ne not + fari to speak.]
   Unfit to speak of; unmentionable; impious; execrable. [Obs.]
   ``Nefand adominations.'' --Sheldon. ``Nefandous high
   treason.'' --Cotton Mather.