Source : Webster's Revised Unabridged Dictionary (1913)

Bemoan \Be*moan"\, v. t. [imp. & p. p. {Bemoaned}; p. pr. & vb.
   n. {Bemoaning}.] [OE. bimenen, AS. bem?nan; pref. be- + m?nan
   to moan. See {Moan}.]
   To express deep grief for by moaning; to express sorrow for;
   to lament; to bewail; to pity or sympathize with.

         Implores their pity, and his pain bemoans. --Dryden.

   Syn: See {Deplore}.

Source : WordNet®

bemoan
     v : regret strongly; "I deplore this hostile action"; "we
         lamented the loss of benefits" [syn: {deplore}, {lament},
          {bewail}]