The words around the crest are:
* Draco Dormiens Nunquam Titillandus: This translates to "Sleeping dragon never to be tickled".
The other words on the crest are the names of the Hogwarts houses, written in Latin:
* Gryffindor: "Gryffindor"
* Hufflepuff: "Hufflepuff"
* Ravenclaw: "Ravenclaw"
* Slytherin: "Slytherin"