You could use definition or root word to better understand the word or to learn what it means.
He was stabbed in the eye with a wooden stake and was drunk - odysseus said to him his name was nobody so polyphemus shouted 'Nobody is killing me!'
or effectively "nobody is killing me by force or treachery" like you said
To fix the sentence, change "," after 2004 to ";" and remove the "and" before scientists. It makes the sentence sound better.
I hope that helps!
It means unwillingness because you refuse which you are not willing to do it
