Here are some possibilities:
* TREE-see: This pronunciation emphasizes the "ee" sound at the end. It might be used if "Treise" is a surname of German origin.
* TRAY-see: This pronunciation emphasizes the "ay" sound at the end. It could be used if "Treise" is a name of French origin.
* TRE-is: This pronunciation emphasizes the "is" sound at the end. It could be used if "Treise" is a word with a specific technical meaning.
Without more context, it's impossible to know the "correct" pronunciation. If you encounter this word in a specific context, it's best to look for clues within the text or ask the person who used the word how they pronounce it.