"The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people." - The Ninth Amendment
It simply says that just because a right isn't enumerated doesn't mean it doesn't exist. Nothing more, nothing less.
Now, couple that to the 10th.
It meant that if the feds wanted to ban alcohol, it took a Constitutional amemdment. States were free to allow or prohibit alcohol. Without an amendment, the fedgov was silent.
Now, compare that to Griswold (and eventually Roe). SCOTUS found a right to privacy in the 9th that allowed a federal court to strike down a state law banning contraception. That is a complete perversion of the 9th and 10th. The Constitution was silent on the matter. The 9th said that the feds could not constrain a state right. And the 10th said they also could not limit a state power. Griswold found a federal right and limited a state power. And Griswold was the parent of Roe.