Intestable
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INTESTABLE. One who cannot law fully make a testament.
2. An infant, an insane person, or one civilly dead, cannot make a
will, for want of capacity or understanding; a married woman cannot make
such a will without some special authority, because she is under the power
of her husband. They are all intestable.
A Law Dictionary, Adapted to the Constitution and Laws of the United States. By John Bouvier. Published 1856.