  We test the validity of cosmic censorship in the rotating anti-de Sitter
black hole. For this purpose, we investigate whether the extremal black hole
can be overspun by the particle absorption. The particle absorption will change
the mass and angular momentum of the black hole, which is analyzed using the
Hamilton-Jacobi equations consistent with the laws of thermodynamics. We have
found that the mass of the extremal black hole increases more than the angular
momentum. Therefore, the outer horizon of the black hole still exists, and
cosmic censorship is valid.
