What is the abstract noun in this sentence His speech was often interrupted by unruly crowd?

The abstract noun in the sentence "His speech was often interrupted by an unruly crowd" is "interruption".

Here's why:

* Abstract nouns refer to ideas, concepts, qualities, or states of being. They cannot be touched or seen.

* Interruption is the act of stopping or breaking something. It's a concept, not a physical object.

Let me know if you'd like to try another sentence!