disqualify

v. t. [ imp. & p. p. Disqualified p. pr. & vb. n. Disqualifying. ] 1. To deprive of the qualities or properties necessary for any purpose; to render unfit; to incapacitate; -- with for or from before the purpose, state, or act. [ 1913 Webster ]

My common illness disqualifies me for all conversation; I mean my deafness. Swift. [ 1913 Webster ]

Me are not disqualified by their engagements in trade from being received in high society. Southey. [ 1913 Webster ]

2. To deprive of some power, right, or privilege, by positive restriction; to disable; to debar legally; as, a conviction of perjury disqualifies a man to be a witness. [ 1913 Webster ]