Untenable is defined as something that cannot be maintained or defended. If you have a weak argument that falls apart as soon as anyone expresses any skepticism, this is an example of when you have anuntenable argument. that cannot be held, defended, or maintained.
Eighteenth Amendment to the United States Constitution. The Eighteenth Amendment (Amendment XVIII) of the United States Constitution effectively established the prohibition of alcoholic beverages in the United States by declaring the production, transport, and sale of alcohol (though not the consumption or private possession) illegal.
PROHIBITION is a three-part, five-and-a-half-hour documentary film series on PBS directed by Ken Burns and Lynn Novick that tells the story of the rise, rule, and fall of the Eighteenth Amendment to the U.S. Constitution and the entire era it encompassed.