disseizin

from The Collaborative International Dictionary of English v.0.48

Disseizin \Dis*sei"zin\, n. [OF. dessaisine.] (Law)
   The act of disseizing; an unlawful dispossessing and ouster
   of a person actually seized of the freehold. [Written also
   {disseisin}.] --Blackstone.
   [1913 Webster]