Impenning

from The Collaborative International Dictionary of English v.0.48

Impen \Im*pen"\, v. t. [imp. & p. p. {Impenned}and {Impent}; p.
   pr. & vb. n. {Impenning}.]
   To shut up or inclose, as in a pen. --Feltham.
   [1913 Webster]