What is the part of speech for crumbled?

"Crumbled" can be two different parts of speech depending on how it's used:

* Verb (past tense): When "crumbled" describes an action that happened in the past, it's a verb. For example: "The old building crumbled into dust."

* Adjective: When "crumbled" describes a noun, it's an adjective. For example: "The crumbled cookies were still delicious."

To determine the part of speech, look at how the word is used in the sentence.