Out of various usages, 'OK' when used as a response to someone's statement simply means that *we got it.* 

However, I had read somewhere that one of the theories say that ['OK' was *actually* 'All Correct!'](http://www.oxforddictionaries.com/words/what-is-the-origin-of-the-word-ok) And this is the truth. In most of the cases when we say 'OK', it means positively okay. Also, if we consider its Greek origin, it means *ola kala* - ***It's good!***

> 
> *She has reached safely ~ Okay!* 
> 
> 
> 

I felt it *a bit odd* while replying to the confirmation that one of my friends has died (RIP). The conversation was...

> 
> *Yes Maulik, it's confirmed. 'X' is dead* ~ ***~~Okay~~*** 
> 
> 
> 

What I needed is a short word, a kinda synonym of 'Ok' because *'all is **not** correct* there'. 

So, can *Okay* be used there? Isn't it a bit rude?