Here are some examples:
* A specific event: "The car accident" is not a trait because it's a singular occurrence, not a characteristic.
* A physical location: "The park" is not a trait because it's a place, not a characteristic.
* A numerical value: "30 years old" is not a trait because it's a quantity, not a descriptive quality.
* A feeling: "Sadness" is a feeling, not a trait. While someone might *have* a trait of being prone to sadness, sadness itself is not a trait.
Think of it this way: A trait is something that helps you describe something. A non-example is something that identifies something.
Let me know if you want more specific examples, or if you have a particular situation in mind!