The Collaborative International Dictionary of English v.0.48:

Rencounter \Ren*coun"ter\ (r?n-koun"t?r), v. t. [imp. & p. p.
   Rencountered (-t?rd); p. pr. & vb/ n. Rencountering.] [F.
   rencontrer; pref. re- + OF. encontrer to encounter. See
   Encounter.]
   1. To meet unexpectedly; to encounter.
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   2. To attack hand to hand. [Obs.] --Spenser.
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