Inconspicuous comes from the Latin word inconspicuus, or "not visible," and the original meaning of inconspicuous was "invisible," until around 1828. Today, it describes anything that blends in or isn't very noticeable.
In what story are you specifically referring to
Answer: Yes, it is a compound sentence.
Explanation:
The sentence can be broken up into two separate sentences:
“We ran to the store.” and “We forgot our money.”
However, the word but is used to conjoin the sentences together, making it a compound sentence.
Tomorrow I have to walk the dog, write an essay, an mail a letter.