The Collaborative International Dictionary of English v.0.48:

Reprovable \Re*prov"a*ble\ (r?-pr??v"?-b'l), a. [Cf. F.
   r['e]prouvable.]
   Worthy of reproof or censure. --Jer. Taylor.
   [1913 Webster]

   Syn: Blamable; blameworthy; censurable; reprehensible;
        culpable; rebukable.
        [1913 Webster] --Re*prov"a*ble*ness, n. --
        Re*prov"a*bly, adv.
        [1913 Webster]