Whatsoever

[nyggus]

This is what CALD says:
--
whatsoever (ALSO whatever) used after a negative phrase to add emphasis to the idea that is being expressed:

He has no respect for authority whatsoever.

I can honestly say that I have no interest whatsoever in the royal family.

...
--

Is whatsoever often used in (1) casual and (2) academic language? Is maybe whatever preferred?

Thanks,
Nyggus

[Batfink]

This is what CALD says:
--
whatsoever (ALSO whatever) used after a negative phrase to add emphasis to the idea that is being expressed:

He has no respect for authority whatsoever.

I can honestly say that I have no interest whatsoever in the royal family.

...
--

Is whatsoever often used in (1) casual and (2) academic language? Is maybe whatever preferred?

Thanks,
Nyggus

I would not use whatsoever in an academic exercise as it is rather emotional in tone. The word denotes intensity. That is my opinion, maybe others might like to share their ideas.

Whatsoever is an even more intensive form of whatever.

[nyggus]

I would not use whatsoever in an academic exercise as it is rather emotional in tone. The word denotes intensity. That is my opinion, maybe others might like to share their ideas.

Whatsoever is an even more intensive form of whatever.

Unless a piece of academic writing is not free of emotions in tone, which is not unlikely.

I felt whatsoever is stronger than whatever, and you confirmed my feeling.

Thanks,
Nyggus

[Batfink]

Also, in contemporary Britain, young teenagers use "whatever!" when they want to reply that they are just not interested.

It is particularly annoying, but that's teenagers for you!

[nyggus]

Also, in contemporary Britain, young teenagers use "whatever!" when they want to reply that they are just not interested.

It is particularly annoying, but that's teenagers for you!

Yes, CALD gives this definition as well, though fortunately this is only whatever which carries this meaning, and whatsoever is free of this burden.

Nyggus

[lo2]

Whatsoever