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.
Confidence votes 32. If you are speaking of the the US Prohibition from 1919-1933, the prohibition of alcohol was passed as the 18th Amendment to the US Constitution by Congress over the veto of then President Woodrow Wilson as a result of pressure from the temperance movement.