To misuse is to use contrary to a thing's use (purpose): to use biological weapons to kill people is not misuse, it is use, that's what they're for; to use sci

To misuse is to use contrary to a thing's use (purpose): to use biological weapons to kill people is not misuse, it is use, that's what they're for; to use scissors to kill people is misuse, since the principle use of scissors is to cut paper, cloth and so on.