To deprive of eligibility or render unfit; to disable or incapacitate.
To be disqualified is to be stripped of legal capacity. A wife would be disqualified as a juror in her husband's trial for murder due to the nature of their relationship. A person may be disqualified for employment at a certain job because of a physical disability.
Law Library - American Law and Legal InformationFree Legal Encyclopedia: Directed Verdict to Do Not Attempt Resuscitation order (DNAR order)