disable

Etymology

dis- + able

verb

1. (transitive) To render unable; to take away an ability of, as by crippling.
2. (chiefly of a person) To impair the physical or mental abilities of; to cause a serious, permanent injury.
   Falling off the horse disabled him.
3. (chiefly electronics, computing) To deactivate, to make inoperational (especially of a function of an electronic or mechanical device).
   The pilot had to disable the autopilot of his airplane.

adj

1. (obsolete) Lacking ability; unable.