Hi! I have some terminal confusion/desires I'd like to clear up.
For the most part everywhere I search and read the terminal shortcuts ctrl+u ctrl+k ctrl+w etc are described as "deleting" characters and in the output of stty -a ^U is typically assigned to something called "kill" and then of course there's the common knowledge that (on terminal) ctrl+y does something referred to as "yanking"(?) that prints back the characters that were deleted.
Now correct me if I'm wrong, but I often think of this behaviour more as "cutting and pasting", furthermore that's how I've been typically using these shortcuts recently. I often find myself then in the pickle of wanting to keep the last thing I cut or "deleted" in-tact while deleting a line.

So my short-form question would then be, how can I delete to the end of a line in terminal such as the behaviour received from ctrl+u and ctrl+k without disturbing the contents of ctrl+y? OR is there another cut/deletion method that stores it's own seperate content so I could then designate a cut/delete shortcut as my conceptual "delete-only" command? Also please I'm not interested in work arounds like "use the mouse right-click" I wanna do this in terminal-only, as in just my keyboard

If you are using bash, then these commands are provided by the readline library. You can read about it in Chapter 8: Command Line Editing. Unfortunately, there don't seem to be any functions that delete without adding to the kill ring. Fortunately, killing and yanking is slightly different than your typical cut and paste implementation in that you have a kill ring which saves multiple pieces of text that you've killed. After yanking the latest thing, you can go back through the ring with M-y (that's alt+y).

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so there is absolutely no way to delete all the characters that doesnt change the latest thing on the kill ring? I notice that it's totally ok to delete one character with delete or backspace. is there any way to access/set the contents of what would be yanked from an executable script?
(I read the manual refreshing)

Yeah, but if you pass a numeric argument to delete multiple characters it adds to the kill ring:
The readline stuff only works in interactive mode, it's disabled in scripts.

I suppose yank-pop will do..
would be useful if there were a variation of ctrl-u and ctrl-k that didn't add to the kill-ring but oh well