Here's why:
* Intrude is a verb, not an adjective.
* Run-on adjectives are typically formed by adding "-ing" or "-ed" to a verb. However, doing so with "intrude" doesn't create a natural or common adjective.
To convey the meaning of "intruding" in an adjective form, you could use alternatives like:
* Intrusive: This is the most common and direct way to describe something as "intruding."
* Unwelcome: This emphasizes the unwanted nature of the intrusion.
* Interfering: This highlights the act of disrupting something.
For example, instead of saying "The noise was intruding," you could say:
* "The noise was intrusive."
* "The noise was unwelcome."
* "The noise was interfering with my work."