Here's why:
* Onomatopoeia: Words that imitate the sound they describe.
* "Burst" doesn't directly imitate the sound of something exploding. It's more of a descriptor of the event.
However, the word "burst" is closely associated with the sound of something breaking or exploding. We often imagine the sharp, sudden sound when we hear the word.
Therefore, "burst" is an example of imitative onomatopoeia. It doesn't directly mimic the sound, but it evokes the sound through its meaning and association.
Here are some examples of more direct onomatopoeia:
* Bang
* Crash
* Pop
* Sizzle
These words are more direct imitations of the sounds they represent.