The Collaborative International Dictionary of English v.0.48:

Repine \Re*pine"\ (r?-p?n"), v. i. [Pref. re- + pine to
   languish.]
   [1913 Webster]
   1. To fail; to wane. [Obs.] "Reppening courage yields no foot
      to foe." --Spenser.
      [1913 Webster]

   2. To continue pining; to feel inward discontent which preys
      on the spirits; to indulge in envy or complaint; to
      murmur.
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            But Lachesis thereat gan to repine.   --Spenser.
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            What if the head, the eye, or ear repined
            To serve mere engines to the ruling mind? --Pope.
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The Collaborative International Dictionary of English v.0.48:

Repine \Re*pine"\, n.
   Vexation; mortification. [Obs.] --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

repine
    v 1: express discontent