I argue irrespective/irrespectively of what I do.

Which word do I choose?

I'd choose a completely different word! I'd choose "regardless."

The sentence seems meaningless, though. What are you trying to say? What is the context?

Yes, this sentence is meaningless. My original sentence is actually very different; I wanted to know if I use the adjective or adverb in this case. But yes, I think I'll use "regardless" now.

But still, for future purposes...which word do I use?

I'd use the adjective form ... AND a comma after "argue," too.

Okay, thanks!

You're very welcome!

To figure out which word to use in this sentence, let's break it down and understand the meaning of each word. "Irrespective" and "irrespectively" are two similar words that can be confusing to differentiate.

"Irrespective" means without consideration or attention to something. It is often used to emphasize that something is unrelated to or does not depend on another factor. For example: "She plays the piano well, irrespective of whether or not she has had formal training."

On the other hand, "irrespectively" is not widely used in standard English but is sometimes used in technical or legal contexts. It is most commonly used as an adverb to describe that something is done without taking into account or consideration of other things. For example: "The company offered the job to all candidates, irrespectively of their qualifications."

Based on the context you provided, it seems like you are discussing your own behavior or actions. In this case, the correct word to use is "irrespective," as it emphasizes that your argument doesn't depend on or is not affected by what you do. Therefore, the correct sentence would be: "I argue irrespective of what I do."

Remember, context is crucial in choosing the right word, and it is always helpful to consult a dictionary or reputable sources for further clarification if you are uncertain about the usage of a particular word.