Noun: "Crackle" refers to the sound or appearance of something breaking, splitting, or snapping.
* Example: We heard the crackle of the fire in the fireplace.
Verb: "Crackle" means to make a crackling sound or to split or break with a crackling sound.
* Example: The wood crackled as it burned.
Adjective: "Crackle" can be used as an adjective to describe something that makes a crackling sound or has a cracked or broken appearance.
* Example: The old vase had a crackle glaze.
It's important to consider the context of the sentence to determine which part of speech "crackle" is functioning as.