The Onomatopoeia...

This is a writing 'device' used to place words into a sentence that sound like the word itself. Words such as thunk, flap, drip, flush, etc..

Using this in your writing is a matter of preference. You like it or you do not.

I'll have to wait and see what I find in the fantasy fiction literature to explain this concept more concretely. Granted, I could just copy some text from an elementary school teacher's lesson plan. But...that would not be adequate.

For further reading:

• Definition
• Onomatopoeia or Overwhelming Writing Devices
• The Sound of One Knife Stabbing
• Use onomatopoeia to make your writing pop
• Why Most Attempts and Onomatopoeia Fail
• Fantasy Writers: Forum Discussion