Making a command unusable

[xcd222]

How will I make a command "unusable"(by the player only to make things easier) by using the trigger statements? I want a certain move of my character to be disabled when life <= lifemax/2.

[Odb718]

triggerall = life > lifemax/2
in the cmd for each move.

[xcd222]

triggerall = life > lifemax/2
in the cmd for each move.

Oh, I should have thought of the other way around.