Here are some examples of words that come from this root:
* Nautical: Relating to ships, sailors, or navigation.
* Nautilus: A type of marine mollusk that lives in a spiral shell.
* Astronaut: A person who travels in space. (The "astro" part comes from the Greek word for "star").
* Cosmonaut: A Russian astronaut.
* Nauseous: Feeling sick to your stomach (although it's more commonly associated with the Latin root "nausea").
Let me know if you'd like to explore other word roots!