affrightful

from The Collaborative International Dictionary of English v.0.48

Affrightful \Af*fright"ful\, a.
   Terrifying; frightful. -- {Af*fright"ful*ly}, adv. [Archaic]
   [1913 Webster]

         Bugbears or affrightful apparitions.     --Cudworth.
   [1913 Webster]