Source : Webster's Revised Unabridged Dictionary (1913)

Enfouldred \En*foul"dred\, a. [Pref. en- + OF. fouldre, foldre,
   lightning, F. foudre, L. fulgur.]
   Mixed with, or emitting, lightning. [Obs.] ``With foul
   enfouldred smoke.'' --Spenser.