contumacious (adjective) contumacious: headstrong, obstinate
Sinonime: ball up, boggle, botch, butcher, drop the ball, err, flub, foul up, fudge, fumble, goof up, gum up, louse up, make a mess of,
mar, mess up, miscalculate, mishandle, mismanage, muff,
ruin, screw up,
spoilAntonime: do well, fix,
manage,
succeed