enumerate

In a census year, the U.S. government attempts to enumerate every single citizen of the country—a task that, even in the modern era of technology, isn't truly possible. Medical tests often require the enumeration of bacteria, viruses, or other organisms to determine the progress of a disease or the effectiveness of a medication. Despite its numer- root, you don't have to use numbers when enumerating. For students of government and law, the "enumerated powers" are the specific responsibilities of the Congress, as listed in the U.S. Constitution; these are the only powers that Congress has, a fact that the Tenth Amendment makes even more clearly.