Which word could be eliminated for a stronger effect what is the nature of your complaint?

The word that could be eliminated for a stronger effect in the phrase "What is the nature of your complaint?" is "of".

Here's why:

* Conciseness: Removing "of" makes the phrase more concise and direct.

* Emphasis: The phrase becomes stronger by placing more emphasis on the word "complaint."

* Clarity: It emphasizes the action of "complaining" without unnecessary prepositional phrasing.

The revised phrase, "What is your complaint?", is more impactful and conveys the same meaning with fewer words.