What part of speech is the word blur?

The word "blur" can be a few different parts of speech depending on how it's used in a sentence:

* Noun: When referring to a hazy or indistinct image.

* Example: "The speeding car was just a blur."

* Verb: To make something hazy or indistinct.

* Example: "The rain blurred the city lights."

* Adjective: Describing something that is hazy or indistinct.

* Example: "The photo was a blur of colors."

So, the part of speech depends on its function in the sentence.