The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]