The word for something you want but cannot have is "unattainable." It describes desires or goals that are beyond reach or not achievable, often leading to feelings of frustration or longing. Another term that captures this sentiment is "elusive," which refers to something that is difficult to find, catch, or achieve.
Infeasible
The word "another" in the question implies that you already have one or more in mind. But you have not bothered to share that crucial bit of information. I cannot therefore be sure that what I suggest is "another" and not something that is already known. I cannot, therefore, provide a more useful answer.
Untouched. Unassailable.Incomparable.
obtain
The word good is an abstract noun form; a word for something conforming to a moral order; praiseworthy character; something beneficial or useful. The plural noun 'goods' is a concrete noun; a word for something having value; something produced for purchase.The abstract noun form for the adjective good is goodness.
"Desire" is a word for something you want.
something that cannot be avoided = inevitable
A want is something you could do with. A need is something you cannot do without.
Impossible.
Inedible.
The word for that is illegible. The prefix for this word is il-.
Odorless
An imborgatant
Infeasible
The word is denial. It means that a person does not want to know or accept something.
The word undeniable is an adjective. It describes something which cannot be denied.
Something that you want or would like to have.