It might be a misspelling of:
* "Treat": meaning to give someone something pleasant or enjoyable.
* "Tread": meaning to walk or step on something.
* "Tret": a specific term used in the context of specific industries (for example, "tret" can be a slang term in the textiles industry).
If you could provide more context about where you saw the word "tret," I might be able to help you understand what it means.