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.
      [1913 Webster]

            But Lachesis thereat gan to repine.   --Spenser.
      [1913 Webster]

            What if the head, the eye, or ear repined
            To serve mere engines to the ruling mind? --Pope.
      [1913 Webster]

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

Moby Thesaurus II by Grady Ward, 1.0:

25 Moby Thesaurus words for "repine":
   be sorry for, bemoan, bewail, deplore, dirge, elegize, fuss,
   give sorrow words, grieve, keen, kick, knell, lament, moan, mourn,
   murmur, regret, rue, rue the day, sigh, sing the blues, sorrow,
   wail, weep over, whine