The meaning of "endless abnegation"

Continually giving up one's rights to something.

could u kindly provide some examples?

It is not the kind of thing one gives 'emamples' of: it is rare pairing of very restricted use. You can try googling for it. If you find interesting examples, you can post them here.

I had no idea what that word meant. I would have looked it up in the dictionary if Mr. M hadn't posted his response. You won't need this word often in your life. I never have.