v. 25B6; noun a hardened reprobate : ROGUE, rascal, scoundrel, miscreant, good-for-nothing, villain, wretch, rake, degenerate, libertine, debauchee; informal, dated rotter, bounder; dated cad; archaic blackguard, knave, rapscallion, scapegrace.
25B6; adjective reprobate behaviour : UNPRINCIPLED, bad, roguish, wicked, rakish, shameless, immoral, degenerate, dissipated, debauched, depraved; archaic knavish.
25B6; verb (archaic) they reprobated his conduct : CRITICIZE, condemn, censure, denounce.