Repine (r-pn), v. i.
Etymology: [Pref. re- + pine to languish.]
1. To fail; to wane. [Obs.] "Reppening courage yields no foot to foe." Spenser.
2. To continue pining; to feel inward discontent which preys on the spirits; to indulge in envy or complaint; to murmur. But Lachesis thereat gan to repine. Spenser. What if the head, the eye, or ear repined To serve mere engines to the ruling mind Pope.
1 other Webster entry under this spelling
Repine, n.
Vexation; mortification. [Obs.] Shak.
Shades of meaning
Fernald has no entry of its own for repine; he lists it under complain.
He lists it without comment; the entries above explain its neighbors.