An amendment is what it says: a change, a correction, or rectification, etc. If the American Constitution had not been altered by the Bill of Rights, or by the various other amendments giving, for example, the vote to women, or abolishing slavery, the USA would not be "one of the greatest nations on earth," which it undoubtedly is.

The fact that, in 1919 it was felt necessary to use the Constitution to prohibit the production of alcoholic beverages, and, in 1933 it was felt necessary to amend that part of the Constitution again, to repeal the earlier amendment shows that changes can be made to the document, if necessary over and over again.