The Collaborative International Dictionary of English v.0.48:

Restringe \Re*stringe"\, v. t. [imp. & p. p. Restringed; p.
   pr. & vb. n. Restringing.] [L. restringere. See
   Restrain.]
   To confine; to contract; to stringe. [Obs.]
   [1913 Webster]