Guard (ガード Gādo) is the way to defend in the Tekken games. It is accomplished by inputting the opposite direction to the enemy. Holding diagonally down results in a "Crouch Guard". The player can also guard if they are standing still, called a neutral guard.
Although guard is a defensive position, it can easily be broken by either doing an Unblockable or a Throw. They can also be broken if the player does a Low Attack on a normal guard or a High Attack or Mid Attack on a crouching guard.
The player can also choose to have guard damage (partial damage even when guarding) on in the Options menu.